https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #278 from Alex Deucher alexdeucher@gmail.com --- Be careful. There are two issues here: 1. The general instability of dpm on r6xx (what this bug is about) 2. A potential additional dpm stability issue perhaps introduced by the bisected commit
Solving the second one won't necessarily help the fix the first one.