after a day testing, I've finally been able to reproduce but still didn't find a pattern to do it reliably. It seems to happen after a system upgrade.
lightdm logs are attached. I noticed that each time it happens there is the following message in syslog Oct 4 23:55:32 white kernel: [ 175.787767] init: lightdm main process (909) killed by ABRT signal I'll attach the list of packages that have been updated to next comment. ** Changed in: lightdm (Ubuntu Oneiric) Assignee: (unassigned) => Robert Ancell (robert-ancell) ** Attachment added: "var_log_lightdm.20110104.851345.tgz" https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/851345/+attachment/2510273/+files/var_log_lightdm.20110104.851345.tgz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/851345 Title: compiz crashes on i915 graphic module with GLX_EXT_texture_from_pixmap is missing To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/851345/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs