Oh no ... I just ran into this again! After a fresh install, so it's not an upgrade-related issue. I was watching the Flash video in Chrome on this page: http://googleblog.blogspot.com/2012/05/introducing-knowledge- graph-things-not.html and the x-server just b0rked and I was kicked back to the log in screen.
I found these relevant lines in my syslog: May 16 15:57:47 jason-desktop kernel: [85074.193818] Xorg[2830] general protection ip:7fc712d046a9 sp:7fff666cb4b0 error:0 in nvidia_drv.so[7fc712ca3000+6e0000] May 16 15:57:49 jason-desktop kernel: [85076.401865] eclipse[6819]: segfault at 18 ip 00007f67a935330e sp 00007fff8e201a80 error 4 in libgdk-x11-2.0.so.0.2400.10[7f67a92e1000+ad000] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/973096 Title: Nvidia driver causes xorg crash To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/973096/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs