Same problem, freezing completely no input response at all. It definately looks like there's two bugs here:
One where just the display freezes CTRL/ALT/F1 allows access to a terminal. One where system locks completely requiring hard reboot. I'm guessing the hard freeze issues relate to a bug here which seems to be affecting multiple distros: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/908335 -- 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/993187 Title: ubuntu 12.04 64bit completely freezes frequently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/993187/+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