It looks like your system ran out of memory for whatever reason. X just happens to be the first really critical thing to notice that there's no memory left. It tends to need memory for doing its stuff. ;-) The reason you can't restart X is because the GPU got left in an inconsistent state (which is probably a bug in itself, but not the primary issue here).
But, I can try to help you figure out what actually is causing this bug. (As it is, the info you've collected doesn't really do much to pinpoint what's going on.) Can you tell me a little more about your system. Are you booted off a hard drive or usb key or cd? How long have you been running natty? When did you start noticing this bug? Has it happened multiple times? What is unique or unusual about your system? Does it always happen after about the same period of time? Does running a certain app or combination of apps make it more likely to crash? ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/742175 Title: [i915] xserver crashes abruptly (OOM?) _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp