Looking at your original description, though, you claim that Unity2D is unaffected. If this is true then I'm guessing that either the driver is having issues with compositors + hardcore video playback or that both compiz or mutter are having the same issue.
Looking at your original description, though, you claim that Unity2D is unaffected. If this is true then I'm guessing that either the driver is having issues with compositors + hardcore video playback or that both compiz or mutter are having the same issue.