Comment 9 for bug 964788

This bug is not a duplicate of bug 988079. It appears with compiz even if the unity plugin is deactivated. The only workaround is to temporary unredirect fullscreen windows when starting a game. (thank you daniel for the hint)

I want to add that the same problem appears even if I don't start the game in fullscreen mod. I get a ~20% framedrop but, what is much worse for the gaming experience, the framerate is very uneven. Also tearinglike artifact appears and vsync doesn't effect it.

As I mentioned before, this bug is a regression since it appeared with Ubuntu 12.04 and is still present in 12.10.