(from downstream report)
Description of problem:
In previous Fedora/RHEL there has always been a 60 wait after receiving an ACPI
shutdown request if the user is logged into a session. If at the GDM prompt
with no one logged in, it would shutdown immediately.

In current Fedora/RHEL-6 the 60 second delay appears to have propagated itself
to the GDM login screen too.

This is a particular problem/annoyance for virtualized guests, because running
'virsh shutdown GUEST'  triggers an ACPI power button event, and instead of
shutting down immediately, it sits around waiting 60 seconds.

IMHO this needs to be reverted to the previous behaviour where there is NO
delay when no users are logged in via GDM.

Version-Release number of selected component (if applicable):
gdm-2.28.2-5.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Boot a guest upto initlevel 5 leaving it at the GDM login screen
2. Run  virsh shutdown $GUEST
3.

Actual results:
Waits 60 seconds before shutting down

Expected results:
Shuts down immediately