This just happened to me. I used "sudo stop lightdm" and "sudo start lightdm" so I could log back in to Unity without restarting my machine (of course that restarted unity). Killing the gnome-screensaver process didn't work (sometimes that has worked for me in the past).
** Tags added: running-unity staging -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/992070 Title: Ubuntu 12.04 Hangs at Unlock screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/992070/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
