https://bugs.gentoo.org/515088

--- acpid-2.0.25/samples/powerbtn/powerbtn.sh
+++ acpid-2.0.25/samples/powerbtn/powerbtn.sh
@@ -57,7 +57,7 @@
 # If one of those is running or any of several others,
 if pidof x $PMS > /dev/null ||
 	( test "$XUSER" != "" && pidof dcopserver > /dev/null && test -x /usr/bin/dcop && /usr/bin/dcop --user $XUSER kded kded loadedModules | grep -q klaptopdaemon) ||
-	( test "$XUSER" != "" && test -x /usr/bin/qdbus && test -r /proc/$(pidof kded4)/environ && su - $XUSER -c "eval $(echo -n 'export '; cat /proc/$(pidof kded4)/environ |tr '\0' '\n'|grep DBUS_SESSION_BUS_ADDRESS); qdbus org.kde.kded" | grep -q powerdevil) ; then
+	( test "$XUSER" != "" && test -x /usr/bin/qdbus && test -r /proc/$(pgrep -n kded4)/environ && su - $XUSER -c "eval $(echo -n 'export '; cat /proc/$(pgrep -n kded4)/environ |tr '\0' '\n'|grep DBUS_SESSION_BUS_ADDRESS); qdbus org.kde.kded" | grep -q powerdevil) ; then
 	# Get out as the power manager that is running will take care of things.
     exit
 fi