On Sat, 17 Sep 2016 11:34:54 -0500 Rex Dieter wrote:
In this particular case, it's the user session that has processes still running, and not quiting after logout.
There were no "user daemons" till systemd invented them. Every login creates at least a "systemd --user" process which never goes away. If systemd is going to invent user daemons, it should also invent a way to make them exit, but so far the only way that works for me is to force kill off all the "systemd --user" process trees on the system before trying to reboot.