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Remove synthcpu flag for Virtualbox 5 support - #1496

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nathanleclaire:synthcpu
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Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
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nathanleclaire:synthcpu

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
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Remove synthcpu flag for Virtualbox 5 support by nathanleclaire · Pull Request #1496 · docker-archive-public/docker.machine · GitHub
Skip to content
This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

Merged
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu

Conversation

@nathanleclaire

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

@nathanleclaire

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

@nathanleclaire

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
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Skip to content
This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

Merged
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu

Conversation

@nathanleclaire

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

@nathanleclaire

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Remove synthcpu flag for Virtualbox 5 support by nathanleclaire · Pull Request #1496 · docker-archive-public/docker.machine · GitHub
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This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

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ehazlett merged 1 commit into
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nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
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nathanleclaire:synthcpu

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

@nathanleclaire

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' Remove synthcpu flag for Virtualbox 5 support by nathanleclaire · Pull Request #1496 · docker-archive-public/docker.machine · GitHub
Skip to content
This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

Merged
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu

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@nathanleclaire

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

@nathanleclaire

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

@nathanleclaire

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Remove synthcpu flag for Virtualbox 5 support by nathanleclaire · Pull Request #1496 · docker-archive-public/docker.machine · GitHub
Skip to content
This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

Merged
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu

Conversation

@nathanleclaire

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

@nathanleclaire

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

@nathanleclaire

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
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This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

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ehazlett merged 1 commit into
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nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu

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@nathanleclaire

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

@nathanleclaire

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

@nathanleclaire

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh
, 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); Remove synthcpu flag for Virtualbox 5 support by nathanleclaire · Pull Request #1496 · docker-archive-public/docker.machine · GitHub
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This repository was archived by the owner on Jul 18, 2025. It is now read-only.

Remove synthcpu flag for Virtualbox 5 support - #1496

Merged
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu
Jul 12, 2015
Merged

Remove synthcpu flag for Virtualbox 5 support#1496
ehazlett merged 1 commit into
docker-archive-public:masterfrom
nathanleclaire:synthcpu

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@nathanleclaire

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Closes#1387

cc @ehazlett

This option is no longer supported in Virtualbox 5 and creates will fail as long as it is specified.

@SvenDowideit@tianon Do you know if this will affect the experience for users of older versions of VirtualBox (<5)? Given the nature of the flag (it is meant to help preserve transfer of saved-state VMs across platforms), I'm somewhat surprised that we have to turn it off by default anyway.

Signed-off-by: Nathan LeClaire nathan.leclaire@gmail.com

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
@tianon

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I'm not sure what it'll affect, but I'm 100% +1 to removing as many flags as possible and just accepting VirtualBox's defaults, especially when upstream has removed the flag. 😄

@FrenchBen

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@nathanleclaire Can you provide the list of flags available via VBoxManage.
The docs still point to synthcpu being a correct flag:
https://www.virtualbox.org/manual/ch08.html

@nathanleclaire

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@FrenchBen Here's what I see on my system with VBox 5, maybe the docs haven't been updated yet:

$ VBoxManage | grep -A 139 modifyvm modifyvm <uuid|vmname> [--name <name>] [--groups <group>, ...] [--description <desc>] [--ostype <ostype>] [--iconfile <filename>] [--memory <memorysize in MB>] [--pagefusion on|off] [--vram <vramsize in MB>] [--acpi on|off] [--pciattach 03:04.0] [--pciattach 03:04.0@02:01.0] [--pcidetach 03:04.0] [--ioapic on|off] [--hpet on|off] [--triplefaultreset on|off] [--paravirtprovider none|default|legacy|minimal| hyperv|kvm] [--hwvirtex on|off] [--nestedpaging on|off] [--largepages on|off] [--vtxvpid on|off] [--vtxux on|off] [--pae on|off] [--longmode on|off] [--cpuid-portability-level <0..3> [--cpuidset <leaf> <eax> <ebx> <ecx> <edx>] [--cpuidremove <leaf>] [--cpuidremoveall] [--hardwareuuid <uuid>] [--cpus <number>] [--cpuhotplug on|off] [--plugcpu <id>] [--unplugcpu <id>] [--cpuexecutioncap <1-100>] [--rtcuseutc on|off] [--graphicscontroller none|vboxvga|vmsvga] [--monitorcount <number>] [--accelerate3d on|off] [--accelerate2dvideo on|off] [--firmware bios|efi|efi32|efi64] [--chipset ich9|piix3] [--bioslogofadein on|off] [--bioslogofadeout on|off] [--bioslogodisplaytime <msec>] [--bioslogoimagepath <imagepath>] [--biosbootmenu disabled|menuonly|messageandmenu] [--biossystemtimeoffset <msec>] [--biospxedebug on|off] [--boot<1-4> none|floppy|dvd|disk|net>] [--nic<1-N> none|null|nat|bridged|intnet|hostonly| generic|natnetwork] [--nictype<1-N> Am79C970A|Am79C973| 82540EM|82543GC|82545EM| virtio] [--cableconnected<1-N> on|off] [--nictrace<1-N> on|off] [--nictracefile<1-N> <filename>] [--nicproperty<1-N> name=[value]] [--nicspeed<1-N> <kbps>] [--nicbootprio<1-N> <priority>] [--nicpromisc<1-N> deny|allow-vms|allow-all] [--nicbandwidthgroup<1-N> none|<name>] [--bridgeadapter<1-N> none|<devicename>] [--hostonlyadapter<1-N> none|<devicename>] [--intnet<1-N> <network name>] [--nat-network<1-N> <network name>] [--nicgenericdrv<1-N> <driver> [--natnet<1-N> <network>|default] [--natsettings<1-N> [<mtu>],[<socksnd>], [<sockrcv>],[<tcpsnd>], [<tcprcv>]] [--natpf<1-N> [<rulename>],tcp|udp,[<hostip>], <hostport>,[<guestip>],<guestport>] [--natpf<1-N> delete <rulename>] [--nattftpprefix<1-N> <prefix>] [--nattftpfile<1-N> <file>] [--nattftpserver<1-N> <ip>] [--natbindip<1-N> <ip> [--natdnspassdomain<1-N> on|off] [--natdnsproxy<1-N> on|off] [--natdnshostresolver<1-N> on|off] [--nataliasmode<1-N> default|[log],[proxyonly], [sameports]] [--macaddress<1-N> auto|<mac>] [--mouse ps2|usb|usbtablet|usbmultitouch] [--keyboard ps2|usb [--uart<1-N> off|<I/O base> <IRQ>] [--uartmode<1-N> disconnected| server <pipe>| client <pipe>| tcpserver <port>| tcpclient <hostname:port>| file <file>| <devicename>] [--guestmemoryballoon <balloonsize in MB>] [--audio none|null|coreaudio] [--audiocontroller ac97|hda|sb16] [--audiocodec stac9700|ad1980|stac9221|sb16] [--clipboard disabled|hosttoguest|guesttohost| bidirectional] [--draganddrop disabled|hosttoguest] [--vrde on|off] [--vrdeextpack default|<name> [--vrdeproperty <name=[value]>] [--vrdeport <hostport>] [--vrdeaddress <hostip>] [--vrdeauthtype null|external|guest] [--vrdeauthlibrary default|<name> [--vrdemulticon on|off] [--vrdereusecon on|off] [--vrdevideochannel on|off] [--vrdevideochannelquality <percent>] [--usb on|off] [--usbehci on|off] [--usbxhci on|off] [--usbrename <oldname> <newname>] [--snapshotfolder default|<path>] [--teleporter on|off] [--teleporterport <port>] [--teleporteraddress <address|empty> [--teleporterpassword <password>] [--teleporterpasswordfile <file>|stdin] [--tracing-enabled on|off] [--tracing-config <config-string>] [--tracing-allow-vm-access on|off] [--usbcardreader on|off] [--autostart-enabled on|off] [--autostart-delay <seconds>] [--videocap on|off] [--videocapscreens all|<screen ID> [<screen ID> ...]] [--videocapfile <filename>] [--videocapres <width> <height>] [--videocaprate <rate>] [--videocapfps <fps>] [--videocapmaxtime <ms>] [--videocapmaxsize <MB>] [--videocapopts <key=value> [<key=value> ...]] [--defaultfrontend default|<name>]
$ VBoxManage | grep synth
$

Note that synthcpu isn't listed in the help output.

@FrenchBen

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👍 thanks - LGTM

ps: to your question, since the flag was set to 'off' by default, I don't think it would affect users moving forward.

@nathanleclaire

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I've created a Virtualbox VM on 4.3.18 with this patch no problems, I am pretty sure it can be merged.

@guilhermecvm

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+1

@CpuID

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+1 to merging this, same result after installing Virtualbox 5.0 on OSX. docker-machine 0.3.0

Tested HEAD with this patch, no longer getting the error.

@ehazlett

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Tested with vbox 5.0 on linux. Works for me as well.

LGTM

@Spechal

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Kitematic v1.8.2 and docker machine 0.2.0 produce a fatal error and boxes cannot be created.

VBoxManage: error: Unknown option: --synthcpu

VirtualBox 5.0.4 provided by Kitematic

@nathanleclaire

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@Spechaldocker-machine 0.2.0 is way old. Please try the latest release (0.4.1) and see if it works.

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@nathanleclaire@tianon@FrenchBen@guilhermecvm@CpuID@ehazlett@Spechal@bfirsh