OK, I'm beginning to think this is because of faulty hardware. Not the proprietary graphics driver, as it's not loaded, but something else. The computer restarted at least eight times today before I gave up!
Still, if some hardware is faulty shouldn't the OS report this rather than reboot? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1156574 Title: User interface crashes, computer restarts back to login screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1156574/+subscriptions _______________________________________________ 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