Comment 4 for bug 315267

There is absolutely no any new entries appear in /var/log/Xorg.0.log after trying to play video into xvideo output (attempted to play it with mplayer and VLC using xvideo output in both players). However video blinks (it not looks like it is possible to screen shot this bug since this is a issue on border of hardware and software interaction and screen shot has nothing to do with frame rates)

 I bet that from point of view of X server there is exactly nothing wrong. There is no errors in usual sense. There is just no sync in how frames are drawn to the screen so partially drawn frames are actually being displayed (while they do not have to and hardware should wait until frame is drawn fully before actually displaying it, it does so when composite mode is off and then video playback works perfectly but then you can't use Compiz or KDE4 desktop effects).

If someone needs log, here it goes anyway, BUT KEEP IN MIND: there was NO ANY SINGLE LINE ADDED when I played video through xvideo extension. So this log is pretty USELESS for sure and has nothing to do with this bug.