I was also getting ramdon hard freezes in 13.10. I couldn't even switch to the the consle to cleanly reboot. Had to do a hard kill.
I was abble to fix my problem by removing nouveau and installing the Nvidia driver. You results may vary. sudo apt-get install nvidia-current sudo apt-get remote nouveau sudo reboot I'm running 64bit on a clean install if that matters at all. It was never an issue on this machine in previous releases. ** Also affects: xserver-xorg-video-nouveau (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1184451 Title: Ubuntu 13.10 random screen freeze while Normal OS activites To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1184451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs