Thomas,
Perhaps bug 126425 has the solution to your problem. If recompiling xserver-xorg-core without the offending patch makes EXA + Compiz works for you, please report in my bug and mark this one as a duplicate (since mine is detailed upstream too).
Thomas,
Perhaps bug 126425 has the solution to your problem. If recompiling xserver-xorg-core without the offending patch makes EXA + Compiz works for you, please report in my bug and mark this one as a duplicate (since mine is detailed upstream too).