This one looks fairly specific to the nouveau hook to me. It's failing while attempting to attach the result of command_output_quiet, which can be None, and I bet that's what's happening.
** Package changed: apport (Ubuntu) => xserver-xorg-video-nouveau (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/712109 Title: Assert failure in hook for xserver-xorg-video-nouveau -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
