https://bugs.freedesktop.org/show_bug.cgi?id=99275
--- Comment #8 from Reimar Imhof tuxuser@quantentunnel.de --- Created attachment 128779 --> https://bugs.freedesktop.org/attachment.cgi?id=128779&action=edit Xorg.0.log with activated Xorg amdgup driver
I found an Xorg amdgpu.conf file at the arch linux wiki:
Section "Device" Identifier "AMD" Driver "amdgpu" EndSection
With this config the amdgpu Xorg driver gets loaded. But the kernel bug still exists.