I've seen this too, it's somehow related to screen locking or screen saver. My X server crashes immediately when i choose "Lock Session" in the KDE menu in ubuntu. It also crashes when I try to turn off the screensaver.
I've just recently (auto-) removed all packages depending on ubuntu-desktop and xubuntu-* I'm not sure if that had anything to do with it. I also ran out of diskspace during the week, but I --reinstalled the packages that either had no md5 sums or failed the check. I do not get anything in /var/crash at all except for thunderbird and kicker which dies when the server dies. I'm running this command now: apt-show-versions | grep /feisty | awk -F/ '{ print $1 }' | while read x ; do apt-get -y install "$x-dbg" ; done Hopefully this will get me more information than hex values when debugging it. Magnus -- Crash while away from computer https://launchpad.net/bugs/90580 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs