I also get Xlib: connection to ":0.0" refused by server Xlib: No protocol specified
on running $ gksu /usr/bin/update-manager when the user is not in admin group but user ALL=/usr/bin/update-manager is in the sudoers file This is the same for any app I choose to put in the sudoers file. -- gksu breaks X apps when /etc/sudoers has NOPASSWORD: https://launchpad.net/bugs/66328 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs