https://bugs.freedesktop.org/show_bug.cgi?id=79862
--- Comment #12 from nucrap@hotmail.com --- Thanks, I will try the patch!
In case somebody has my graphics card (or a HD 7790 or maybe others too??) I found a definite and easy way to reproduce it:
1. Start a lightweight DE with e.g. openbox or xfwm4 (compositing disabled) 2. Install and start "compton" from a terminal 3. Play this youtube video from firefox with flashplayer: http://www.youtube.com/watch?v=d-Cc6j2ZBwk (happens on others too, but this video is definately affected) 4. The bug should occur in less than 1:30 minutes 5. If it doesn't occur the first time just reload
This should definitely trigger the bug.