I also have this problem on my HP Elitebook 8640w. (i7 CPU, 8Gb RAM, Nvidia Quadro FX 2800m). When I unplug the power cable xorg restarts every couple of minutes. My laptop is useless then.... The only solution is to plugin the power cable, or completely disable acpi (acpi=off as kernel param). I've been searching in several logfiles to find some more useful information (backtraces, errors, or something). But I can't find anything. There's no backtrace in the xorg log. When someone can give me a tip where to look for useful logging, I will get it and post it!
** Changed in: nvidia-graphics-drivers (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/740462 Title: Xorg-nvidia crashes when running on Battery To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/740462/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs