Yeah, all of the X error messages are just generic errors that mean the system ran out of memory. Some other gui app was probably leaking memory badly. The xserver in Lucid has poor low-memory-condition handling, so will crash in those situations, but the underlying problem is going to be something else.
Fwiw, I put in several memory-starvation fixes into xserver subsequent to Lucid, but they don't actually fix the problem, they just make X not crash in these situations; your system is still out of memory and other things will certainly fail. Bumping out of the X queue since figuring out what's leaking will take additional sleuth work. ** Package changed: xserver-xorg-video-intel (Ubuntu) => ubuntu -- 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/588549 Title: [gm45] Xorg crash when idle: Failed to map batchbuffer: Cannot allocate memory To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/588549/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

