--- /etc/acpi/powerbtn.sh.orig	2013-01-13 13:59:24.875371227 +0100
+++ /etc/acpi/powerbtn.sh	2013-01-13 13:59:45.091471450 +0100
@@ -34,6 +34,7 @@
 [ -r /usr/share/acpi-support/power-funcs ] && getXconsole
 PMS="gnome-settings-daemon kpowersave xfce4-power-manager"
 PMS="$PMS guidance-power-manager.py dalston-power-applet"
+PMS="$PMS mate-power-manager"
 
 if pidof x $PMS > /dev/null; then
         exit