https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #60 from Hrvoje Senjan hrvoje.senjan@gmail.com --- (In reply to comment #59)
please try this branch: http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-fixes-3.11 after a cold shutdown.
This seems to have fixed the issues here :-)
/sys/kernel/debug/dri/0/radeon_pm_info uvd vclk: 0 dclk: 0 power level 0 sclk: 11000 mclk: 40000 vddc: 900