This issue has been reported to nvidia here: http://www.nvnews.net/vbulletin/showthread.php?t=174049
Dmesg says: gnome-shell[2265]: segfault at 10 ip 00007fe76212dc0f sp 00007fe74069b638 error 6 in libnvidia-tls.so.295.20[7fe76212d000+3000] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/932781 Title: [xorg-edgers]Regression in the latest Nvidia 295.20 driver driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/932781/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs