https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #258 from Guram Savinov guram.savinov@gmail.com --- (In reply to Maciej Gluszek from comment #257)
@Guram Savinov: I also tried setting DPM + high performance for my HD3650 and it worked but the fan was still running too loud (not overheating just loud).
Then i installed Kernel 4.0, removed "high performance" settings and it works great now. I still have DPM set during boot but no more setting the card to be running on high performance. Couple of days and no lockups.
I'm on Ubuntu.
Maybe turning off DPM (do not set radeon.dpm=1 in kernel parameters) is better than using DPM with high performance?
What Ubuntu release do you use? How you installed kernel 4.0?