It looks like there are probably several other bugs of this type in the hook, e.g.:
upgraded = command_output_quiet( ['head', '-n', '1', '/var/log/dist-upgrade/apt.log']) if len(upgraded) > 0: len(None) will generate a TypeError. ** Changed in: xserver-xorg-video-nouveau (Ubuntu) Importance: Undecided => Medium ** Changed in: xserver-xorg-video-nouveau (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in ubuntu. https://bugs.launchpad.net/bugs/712109 Title: Assert failure in hook for xserver-xorg-video-nouveau _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp