https://bugs.freedesktop.org/show_bug.cgi?id=73625
--- Comment #13 from Roman Elshin roman.elshin@gmail.com --- I think there are two kinds of problems here: first: looping, corruption, black window (also have this). and seems there are 'sleep 1; xset dpms force off' in terminal before using vdpau workaround for that. second: gpu hangs, which seems to be a mesa regression after 9.2.5
Last thing:
Sometimes UVD starts reliable with sound (I even can scroll with the mouse wheel forth and back) but with empty black video window (only the white mplayer scale during scroll). Worst case was: 1 normal start then 5 BAD then OK, again...
Did you try to set dpms off after boot before seeing that?