Comment # 60 on bug 66963 from Hrvoje Senjan

(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