I've just installed Debian/Stretch on a new (to me) laptop and upgraded it to Testing. When I close the lid it doesn't suspend, instead it gives the message "authentication is required for suspending the system while other users are logged in" (presumably due to "ssh user@localhost" but also happens when I've logged out of the ssh session). https://forums.opensuse.org/showthread.php/492950-how-get-rid-of-quot-authen... Above is one Google hit about this, it references a program set_polkit_default_privs which doesn't seem to exist on Debian. https://askubuntu.com/questions/543921/authentication-required-before-suspen... The above page recommends changing /usr/share/polkit-1/actions/ org.freedesktop.login1.policy which doesn't work for me. Any suggestions on what to do? One suggestion that I haven't yet tried is to change XDM programs. I'm happy with sddm and it should work. Ideally I would be able to discover enough about this to file an adequate bug report against sddm.