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.