Update: I just tested 3.12 RC7 kernel. Sound output is fixed (doesn't need xrandr to be enabled but only "radeon.audio=1") but video playback is still "fast forward" like.
Update: I just tested 3.12 RC7 kernel. Sound output is fixed (doesn't need xrandr to be enabled but only "radeon.audio=1") but video playback is still "fast forward" like.