[Bug 105018] Kernel panic when waking up after screen goes blank.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105018

--- Comment #33 from Öyvind Saether <oyvinds at everdot.org> ---
In my case the problem was not having xorg-x11-drv-amdgpu installed (how
embarrassing) which made xorg use xorg-x11-drv-ati. Yes, really. I assumed
Fedora 28 beta installed it along with all the other drives and didn't realize
until comparing the X logs on a box which didn't have a problem with one that
did. I did file the Fedora bug kindly asking xorg-x11-drv-amdgpu to be
installed as a default. 

Simply installing xorg-x11-drv-amdgpu solved this error and amdgpu kernel
crash:
[12743.692030] kernel BUG at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4708!

I realize the immensity of my stupidity not realizing xorg-x11-drv-amdgpu will
make you laugh but it's not like the kernel panic message warned me.

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