I had this problem today, If I start Google Chrome or Chromium it logs me out of X.
uname -a gives Linux garethf-System-Product-Name 3.5.0-19-generic #30-Ubuntu SMP Tue Nov 13 17:48:01 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux and I'm using propriety NVIDIA-Linux-x86_64-310.19 The Xorg.0.log showed a NULL deref in /usr/bin/Xorg. I can only guess that some of the kernel headers must have updated yesterday as it was working fine, but not enough for the nVidia driver not to work. I fixed it by rebuilding the propriety nVidia drivers. All seems to be working fine now, might be related to this so posting just in case it helps anyone. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/980519 Title: Random log off in Ubuntu 12.04 LTS Status in Unity: Fix Released Status in “nvidia-graphics-drivers” package in Ubuntu: Fix Released Status in “xorg” package in Ubuntu: Fix Released Status in Fedora: New Bug description: I get logged off from Ubuntu sometimes. There is no error message or any indication that it is going to log off. The screen goes black, and after 2-4 seconds, i get presented with the Ubuntu Log On Screen. There is no clear pattern (or at least if have not noticed any). One time i am working with Netbeans, another time i am using firefox. This also means that at present i can not clearly say what package might be causing this behaviour. I am fairly sure the problem lies in 12.04 (or more precise - the combination of 12.04 and the hardware i am using). I do not have the same problem running 11.04 or 11.10. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/980519/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
