This is needed to properly halt the machine without powering it down.
See:
https://bugzilla.redhat.com/show_bug.cgi?id=348701
https://bugzilla.redhat.com/show_bug.cgi?id=1442577
diff -up apcupsd-3.14.4/platforms/apccontrol.in.shutdown apcupsd-3.14.4/platforms/apccontrol.in
--- apcupsd-3.14.4/platforms/apccontrol.in.shutdown 2008-05-28 09:15:47.000000000 +0200
+++ apcupsd-3.14.4/platforms/apccontrol.in 2008-05-28 09:16:04.000000000 +0200
@@ -104,7 +104,7 @@ case "$1" in
;;
doshutdown)
echo "UPS ${2} initiated Shutdown Sequence" | ${WALL}
- ${SHUTDOWN} -h now "apcupsd UPS ${2} initiated shutdown"
+ ${SHUTDOWN} -h -H now "apcupsd UPS ${2} initiated shutdown"
;;
annoyme)
echo "Power problems with UPS ${2}. Please logoff." | ${WALL}