https://bugs.freedesktop.org/show_bug.cgi?id=109955

--- Comment #107 from jeroenimo <freedesktop@jeroenimo.nl> ---
I have a workaround that at least makes the system workable.

After some testing I managed to run glmark2 at the lowest and second lowest
clock speed on my RX560

>From root:
echo manual > /sys/class/drm/card0/device/power_dpm_force_performance_level
echo 1 > /sys/class/drm/card0/device/pp_dpm_sclk

giving me this
cat /sys/class/drm/card0/device/pp_dpm_sclk 
0: 214Mhz 
1: 387Mhz *
2: 843Mhz 
3: 995Mhz 
4: 1062Mhz 
5: 1108Mhz 
6: 1149Mhz 
7: 1176Mhz 

Obviously this decreases performance big time, but I don't really game so it
makes my system usable.

Any clock speeds over 4: 1062Mhz crashes my system immediately..

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