https://bugs.freedesktop.org/show_bug.cgi?id=36769

--- Comment #8 from Michel Dänzer michel@daenzer.net 2012-04-06 04:06:42 PDT --- If your card has more than 128M of VRAM (that's just one reason why Xorg.0.log and dmesg should be attached to every bug report...), let's mark this as a duplicate of bug 46796, which has more information about the likely cause and its fix. If you ever hit it again, we can go from there.