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revert(kwin): drop RA24 workaround, LG now on iGPU - #372
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The KWin environment workaround from 31671cd did not stop the RA24 atomic commit failures, and a patched amdgpu.ko was too heavy to maintain. Moving the LG to the iGPU HDMI port avoids the amdgpu plane bug entirely. - Drop KWIN_USE_OVERLAYS and KWIN_DRM_NO_DIRECT_SCANOUT from env.sh. - Drop the plasma-login greeter drop-in and its setup task. - Drop kwin/verify-amdgpu-ra24.sh.
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Why
amdgpu advertises
DRM_FORMAT_RGBA8888on its planes but cannot program it.KWin then loops on failed atomic commits and the desktop freezes. The KWin
environment workaround from 31671cd did not stop these failures.
The LG now runs from the iGPU HDMI port. amdgpu no longer drives that
output, so the bug cannot fire. Suspend, resume and a monitor power cycle
all passed with zero RA24 errors.
What
KWIN_USE_OVERLAYSandKWIN_DRM_NO_DIRECT_SCANOUTfromenv.sh.kwin/verify-amdgpu-ra24.sh.