I haven't tested this, but since seb128 pasted the relevant messages in IRC.
I bet you that it's because polkit isn't considering the D-Bus session of the greeter to be 'active', because it's not finding it. If someone would like to test build a systemd with this commit included: https://github.com/systemd/systemd/commit/a2dcb1d78737d3daa301ee63fbdd02837acb71a8 I suspect the problem would be fixed. ** Also affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1847896 Title: Unable to shutdown or restart from log-in screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1847896/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
