I have been experiencing the same kind of crashes with my Kubuntu Oneiric installs. I am using kdm instead of lightdm, but the crash seems very much alike. I will attach a kdm.log. Please let me know if there is anything I can do to help!
** Attachment added: "kdm.log" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/864010/+attachment/2607296/+files/kdm.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/864010 Title: lightdm segfault in libglib after xorg segfault To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/864010/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs