https://bugs.freedesktop.org/show_bug.cgi?id=66452
--- Comment #4 from Eugene Shalygin eugene.shalygin+bugzilla.FDO@gmail.com --- Created attachment 82507 --> https://bugs.freedesktop.org/attachment.cgi?id=82507&action=edit kernel log after WMV3 decode attempt
Today it managed to avoid hangs one time and gave me the log (the player was mpv master branch using ffmpeg 2.0).
Instead of hanging, it dimed screen couple of times, then showed colours cycle (red, green,blue and so on) and than allowed me to kill the player from console.
After killing the player, I returned to X. The desktop was there, but on the next screen repaint X crashed. After that I was not able to log in into KDE: kwin was crashing X on every start.