Felix Miata wrote:

> These I do whilst logged out of the TDM greeter, so it shouldn't be doing
> anything but waiting. It shouldn't matter what it's waiting for, whether
> an attempt to log in or a direction to reboot or shutdown.

I had same experience - it just arbitrary decides to wait forever. Most of
the time it was waiting for cryptsetup to close encrypted volume or mount
to umount nfs share. After some time I switched to sysv init and all
troubles are gone. Now systemd is sitting ashamed in the corner waiting to
do something and it is good so.

regards