I have a similar issue, reported a little earlier: https://bugs.launchpad.net/bugs/775936
Restarting gdm works for me, though: $ sudo service gdm restart -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/778201 Title: Xorg freeze -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
