OK, I did my best to do what I am being told on http://wiki.ubuntu.com/X/Backtracing.
You can see the attachment. Note: I don't get the logouts anymore. X just stops responding. I have installed Nvidia Proprietary drivers, then went back to Nouveau, behaviour is same. System just freezes, and does not respond. But I can connect through ssh and run commands. ** Attachment added: "gdb-Xorg.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/990357/+attachment/3116890/+files/gdb-Xorg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/990357 Title: X randomly restarts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/990357/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs