https://bugs.freedesktop.org/show_bug.cgi?id=93721
--- Comment #6 from Andy Furniss adf.lists@gmail.com --- (In reply to Ernst Sjöstrand from comment #4)
I think I also had a UVD related hang on Fiji with Powerplay when setting EnableLinuxHWVideoDecode = 1 in /etc/adobe/mms.cfg and watching flash video. Not sure if my Firefox settings affect the result, but I had 100% hang rate. Couldn't find any logs messages though.
On older powerplays I could get a logless uvd lock up - not on current drm-next yet (it took many hours to provoke).
I can trigger a different one with mpv - to get logging you need to wait a few minutes before sysrq as the logging comes from the kernel hung task timeout.