Comment # 3 on bug 94158 from Michael Stenzel

Hello,

I have the same problem with an rx480. Also think it gets triggered
when monitor goes into dpms "off" state. Sometimes I keep vlc running
etc so monitor does not go into sleep, than the issue never happens.

says gpu load 100% under /sys/kernel/debug/dri/0/amdgpu_pm_info
but I only have chrome open with 1 tab and hexchat nothing else.

System: mesa-13.0.1, xf86-video-amdgpu-1.2.0, xorg-1.19.0 kernel 4.8.13
(slackware64-current), GPU: xfx 480 gtr