I have checked the Xfce bug tracker and found this report: https://bugzilla.xfce.org/show_bug.cgi?id=10581
It describes the issue with the bad positioning of the authentication window. So, the problem in 18.04 is that the restart/logout/suspend dialog remains visible/glitched after initiating the suspend process, correct? ** Bug watch added: Xfce Bugzilla #10581 https://bugzilla.xfce.org/show_bug.cgi?id=10581 -- You received this bug notification because you are a member of Xubuntu Developers, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1615612 Title: systemd-inhibit authentication ignored by suspend request To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-session/+bug/1615612/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~xubuntu-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~xubuntu-dev More help : https://help.launchpad.net/ListHelp

