[systemd-devel] 'systemctl poweroff' no longer shuts down system -- instead, reboots ?

[grantksupport at operamail.com]

I'm running on kernel

	uname -a
		Linux desk0107 3.17.1-2.g5c4d099-desktop #1 SMP PREEMPT Sat Oct 18 23:36:23 UTC 2014 (5c4d099) x86_64 x86_64 x86_64 GNU/Linux

with

	systemctl --version
		systemd 210
		+PAM +LIBWRAP +AUDIT +SELINUX -IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ +SECCOMP +APPARMOR

shutdown/reboot are handled by systemd

	ls -l /sbin/shutdown /sbin/reboot
		lrwxrwxrwx 1 root root 18 Oct 26 11:36 /sbin/reboot -> /usr/bin/systemctl*
		lrwxrwxrwx 1 root root 18 Oct 26 11:36 /sbin/shutdown -> /usr/bin/systemctl*

when I exec either

	systemctl reboot
	shutdown -r now

the system reboots as always.

but, when if I try to shutdown with either

	systemctl poweroff
	shutdown -h now

the system does NOT shutdown -- it reboots.

this is not a universal problem -- it's limited to just a few machines; each of them _had_ been shutting down reliably previously.  I don't yet know what upgrade in the interim, if any, has affected this.

So far I've not managed to find a source of the problem.

What specific systemd troubleshooting info can I dig out that might shed some light?