thank you for your bug report, you need to use "allow-guest=false" in the seat definition, your conffile seems to be from an old version
** Changed in: lightdm (Ubuntu) Importance: Undecided => Low ** Changed in: lightdm (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/851494 Title: guest session cannot be turned off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/851494/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs