--- /usr/share/acpi-support/power-funcs.orig	2012-10-09 16:48:25.000000000 +0300
+++ /usr/share/acpi-support/power-funcs	2013-01-06 19:10:11.715108915 +0200
@@ -61,7 +61,7 @@
 checkStateChanged() {
 # do we have our state stashed?
         if [ -f "$POWERSTATE" ]; then
-                OLDSTATE=$(<$POWERSTATE) 
+                OLDSTATE=`cat $POWERSTATE`
                 if [ "$STATE" = "$OLDSTATE" ]; then
                        exit 0
                 else