https://bugs.freedesktop.org/show_bug.cgi?id=73053
--- Comment #39 from Alexandre Demers alexandre.f.demers@gmail.com --- (In reply to comment #38)
Attachment 102081 [details] fixes the "hard lockup with small vertical blue stripes" issue, when applied to 3.15.4, and AFAICS dpm works fine.
The new problem is that I get kernel panic after a few hours if dpm is enabled. With the good old profile method the system is stable.
Could you test with latest kernel 3.16 RC (the patch is already included)? I have been running kernel 3.16-RC4 with this patch for Cayman and I don't get any lockups anymore. I've been running my system for a few days (games, movies and so on) without problem.