Comment # 24 on bug 101387 from Carlo Caione

> Sounds like there is also a bug somewhere in the kernel (driver), but
> even if that was fixed, it still wouldn't solve the plymouth issue
> in all cases.
Yeah, so what should be the right way of proceeding here? I image something
like:
- Retrieve the gamma size from the kernel with drmModeGetCrtc()
- Build a linear ramp using the correct size
- Set it with drmModeCrtcSetGamma()
- Call drmModeSetCrtc()