I have this kind of problem too. When I power on my computer, auto log in to Ubuntu 12.04,viivaviivaviivaviiva then there are few little flickering lines top of the screen. I can open software and do pretty much anything, but when I push ENTER first time, it logs out to log on screen and after that the problem does not exist until I shut down my computer and start over.
I have AMD HD4850, not Nvidia, I'm using those drivers from the 'Additional Drivers'. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/980519 Title: Random log off in Ubuntu 12.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/980519/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs