[Bug 68571] GPU lockup on AMD Radeon HD6850 with DPM=1

https://bugzilla.kernel.org/show_bug.cgi?id=68571

--- Comment #70 from prettyvanilla@posteo.at --- I just had my Sapphire HD 6870 (Dirt3 Edition) successfully reset itself after a lockup for the first time (as opposed to the usual black or funnily patterned screen), so I can post my dmesg. Gaming seems to work without a hitch (played through The Swapper in one go), but doing anything which uses the UVD seems to be a ticking time bomb. (Yes, Magic SysRq keys work usually after a lockup.)

If there is any additional data that would help to debug this, please tell me how to provide it...