This X crash is due to error messages being printed to the log file after the log file has been closed. This was being done in the signal handler due to a Ubuntu patch. I've corrected the patch to not print these errors, which should eliminate this crash.
However, still whatever problem had caused the X error to begin with is still there, and it is likely that X will still be failing, just without crashing (or perhaps with a different kind of crash). This crash is hiding that information however. So the good news is hopefully this will unhide that information. After updating to version 2:1.7.3.902-1ubuntu7 please re-test your original issue; if it still occurs file a new bug. Hopefully apport will provide better information in this case now. ** Changed in: xorg-server (Ubuntu) Importance: Medium => High ** Changed in: xorg-server (Ubuntu) Status: New => In Progress -- Xorg crashed with SIGSEGV in FatalError() when using guest session https://bugs.launchpad.net/bugs/506510 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs