Some great digging by VirtuAlex (thanks!) turned up these bugs that might be related also:
https://launchpad.net/distros/ubuntu/+source/xserver-xorg/+bug/50245 https://launchpad.net/distros/ubuntu/+source/xserver-xorg/+bug/49980 https://launchpad.net/distros/ubuntu/+source/nvidia-glx/+bug/49834 https://launchpad.net/distros/ubuntu/+source/xserver-xorg/+bug/47122 The last one is especially interesting as it contains reproduction instructions that work for me too. I've also notified nvidia of the problem, see the forum thread here: http://www.nvnews.net/vbulletin/showthread.php?t=73033 -- login/passwd/ppp updates on 6 july 2006 crash the X server https://launchpad.net/bugs/52056 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
