This is an annoying bug that hasn't been addressed in the two and a half years it has plagued Ubuntu with the Xfce desktop. One can find bug reports going back to 14.04 after a faulty patch broke suspend. Fortunately for the terminally-skilled among us, the workaround is here:
http://askubuntu.com/questions/543921/authentication-required-before- suspend -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1605189 Title: Authentication is required for suspending the system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1605189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
