I can confirm the same thing happening here. It only happens once a week or so, and it requires a bunch of restarts before the boot process actually makes it to a login screen again.
I've attached my /var/log/messages for the period in which it happened. It only shows 2 restarts, but I'm sure I did more. ** Attachment added: "messages" http://launchpadlibrarian.net/44193085/messages -- xorg segfault at 7 ip 00007f59ce3a010f sp https://bugs.launchpad.net/bugs/523337 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-180 in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp