Exactt, are you still using the Edgy version of xorg? Are you able to try stock Feisty, including Feistys xorg?
Ernst, I assume you are using a completely stock Feisty system? -- compiz crashes on AMD64 (EM64T Xeon) and nVidia Quadro https://launchpad.net/bugs/31679 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs