NebulaOS Kernel

The Linux 6.6 kernel SDK NebulaOS runs on the Creality Ender-3 V3 KE (Ingenic X2000).

Yes, the main branch here is called openke. That's an old branch name we kept for history — this repo is a NebulaOS component and isn't part of the separate OpenKE project. It just predates this repo's rename and never got renamed for branding reasons.

Branch	What's there
openke	The real NebulaOS lineage. Every kernel change NebulaOS made — NS2009 touch, the display panel driver, the BT H5 vendor extension, a watchdog fix, DTS wiring, some Kconfig compression selects — lives here as an actual commit, not a patch file applied at build time.
main	The unmodified upstream SDK (Llixuma/ingenic-linux-kernel6.6-x2000-v1.0-20250221) — this fork's starting point, untouched by any NebulaOS work.

You probably don't want to build this repo directly

If you want the complete NebulaOS image, start at NebulaOS-firmware instead. It pins an exact commit of this repo's openke branch, fetches just the kernel source it needs (a sparse checkout — the full SDK here is ~684MB), and applies 8 build-time kernel variants on top before compiling.

The 8 build-time variants

These live in NebulaOS-firmware, not here — this repo only holds the base kernel source they patch at build time. Applied in order by scripts/build/apply-qualified-baseline.sh (though the order doesn't actually matter — each one touches its own files):

1. PREEMPT_RT
2. WiFi SDIO IRQ priority
3. VSYNC-gated display panning
4. A pinctrl ownership fix
5. The final backlight controller
6. PWM state readback
7. The final touch driver
8. Disabling WiFi roaming

If you're setting up a device

The install/update/recovery docs all live in NebulaOS-firmware, not here — this repo is just kernel source:

• NebulaOS-firmware wiki
• Build From Source — how this repo's openke branch actually gets pulled in and patched
• A/B Slot Model

License

This is a whole SDK — kernel, Buildroot, u-boot, and a handful of vendored tools — each under its own upstream license, so there's no single root LICENSE file that covers everything. The kernel itself is at kernel/kernel-6.6/COPYING (GPL-2.0) and kernel/kernel-6.6/LICENSES/; other top-level directories have their own license files. GitHub's license detector only looks at the repo root, so it'll correctly show "no license detected" here — check the specific subdirectory you're actually using.