https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #148 from 720 p@repa.info --- Read that DPM is coming to 3.13. The issue is still not fixed however.
Any info on this? Is there a chance that it will ever get fixed? ( I followed the conversation but so far it seemed Alex wasn't able to track down the issue, and could only apply workarounds that literally disable the whole power management. )