I installed the nvidia proprietary drivers and after three days no freezing occurred in Kubuntu. I uninstalled the proprietary drivers and freezes are back. Clearly, my problem is related to the "nouveau" drivers. In a few posts above I put what I get after freezing in kern.log file.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 completely freezes frequently. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/993187/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
