I have the same problem. My "cure" is to switch to a text console and pkill compiz. Metacity then starts and all is well, and I can switch back to that desktop. If I have clicked the mouse then I can't get a text console so I have to ssh in to kill compiz
my lspci is: 01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] (rev a1) -- Desktop effects freeze when switching user https://bugs.launchpad.net/bugs/95926 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs