The users i see at GDM greeter are, 'dave' and 'mysql' - which doesn't seem to correlate with below:
$ ck-history --frequent dave 2895 gdm 249 root 15 puppet 13 mysql 2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/734910 Title: gdm greeter shows unwanted users -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
