fix for 'stderr' error

dbus-daemon: Would reject message, 1 matched rules; type="method_call", sender=":1.33" (uid=1002 pid=23124 comm=") interface="org.freedesktop.DBus.Introspectable" member="Introspect" error name="(unset)" requested_reply=0 destination="org.freedesktop.Hal" (uid=0 pid=25899 comm="))

here is a patch for hal.conf. Fixed in upstream, obrient from https://bugs.freedesktop.org/show_bug.cgi?id=18985

--- hal.conf.in.orig	2008-08-14 04:32:12.000000000 -0400
+++ hal.conf.in	2008-12-19 12:11:02.000000000 -0500
@@ -16,6 +16,8 @@
 
   <!-- Allow anyone to invoke methods on the Manager and Device interfaces -->
   <policy context="default">
+    <allow send_destination="org.freedesktop.Hal"
+           send_interface="org.freedesktop.DBus.Introspectable"/>
     <allow send_interface="org.freedesktop.Hal.Manager"/>
     <allow send_interface="org.freedesktop.Hal.Device"/>
     <allow receive_interface="org.freedesktop.Hal.Manager"
@@ -26,6 +28,7 @@
     <allow send_interface="org.freedesktop.Hal.Device.SystemPowerManagement"/>
     <allow send_interface="org.freedesktop.Hal.Device.LaptopPanel"/>
     <allow send_interface="org.freedesktop.Hal.Device.Volume"/>
+    <allow send_interface="org.freedesktop.Hal.Device.KillSwitch"/>
     <allow send_interface="org.freedesktop.Hal.Device.Volume.Crypto"/>
     <allow receive_interface="org.freedesktop.Hal.Device.SystemPowerManagement"
 	   receive_sender="org.freedesktop.Hal"/>