The intention is to prevent someone local to the computer from just pulling the power cord or hitting the reset button when the system is locked and they want to shut it down or log in as a different user. I believe these dialog options are configurable via PolicyKit if you've taken the time to harden the local environment as for kiosk use or similar,
Thanks ** Information type changed from Private Security to Public Security ** Changed in: lightdm (Ubuntu) Status: New => Opinion -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1434486 Title: System management options on lockscreen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1434486/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs