[Bug 96326] Heavy screen flickering in OpenGL apps on R9 390

https://bugs.freedesktop.org/show_bug.cgi?id=96326

--- Comment #7 from Alex Deucher alexdeucher@gmail.com --- (In reply to Jan Ziak from comment #6)

(In reply to Alex Deucher from comment #3)

...

Please attach your xorg log and dmesg output.

Upstream Linux kernel does not support variable mclk on R9 390. I enabled variable mclk by patching some code in drivers/gpu/drm/amd/amdgpu/ (mostly ci_dpm.c).

What patch(es) did you use?

dmesg output contains some logging messages I added to my copy of Linux kernel source code.

...

What resolution and refresh rate are you using on your monitor?

1920x1080 60Hz

...

Also are you using radeon or amdgpu?

Currently amdgpu.ko, radeon.ko in the past.