I've narrowed it down to some interaction between Terminal and Emacs 24. You can discount Claws and Gnome Do.
I can reproduce this every time with this recipe: * reboot * login * hit Alt to bring up the launcher * start up a Terminal * In the Terminal, enter "emacs -q" to bring up a vanilla Emacs 24 * Go back to the Terminal and maximize it (i.e. hit the third button from the left in the menu bar, the square) * Go to the global menu bar and double click as if de-maximizing the Terminal * X crashes -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1284134 Title: Xorg crash To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1284134/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs