opt/hal/hal.conf

<!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>

  <!-- This configuration file specifies the required security policies
       for the HAL to work. -->

  <!-- Only root, user haldaemon or group plugdev can own the HAL service -->
  <policy user="haldaemon">
    <allow own="org.freedesktop.Hal"/>
  </policy>
  <policy user="root">
    <allow own="org.freedesktop.Hal"/>
  </policy>
  <policy group="plugdev">
    <allow own="org.freedesktop.Hal"/>
  </policy>

  <!-- Allow anyone to invoke methods on the Manager and Device interfaces -->
  <policy context="default">
    <allow send_interface="org.freedesktop.Hal.Manager"/>
    <allow send_interface="org.freedesktop.Hal.Device"/>
    <allow receive_interface="org.freedesktop.Hal.Manager"
           receive_sender="org.freedesktop.Hal"/>
    <allow receive_interface="org.freedesktop.Hal.Device"
           receive_sender="org.freedesktop.Hal"/>

    <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.Volume.Crypto"/>
    <allow receive_interface="org.freedesktop.Hal.Device.SystemPowerManagement"
	   receive_sender="org.freedesktop.Hal"/>
    <allow receive_interface="org.freedesktop.Hal.Device.LaptopPanel"
	   receive_sender="org.freedesktop.Hal"/>
    <allow receive_interface="org.freedesktop.Hal.Device.Volume"
	   receive_sender="org.freedesktop.Hal"/>
    <allow receive_interface="org.freedesktop.Hal.Device.Volume.Crypto"
	   receive_sender="org.freedesktop.Hal"/>
  </policy>

  <!-- Default policy for the exported interfaces -->
  <policy context="default">
    <deny send_interface="org.freedesktop.Hal.Device.SystemPowerManagement"/>
    <deny send_interface="org.freedesktop.Hal.Device.VideoAdapterPM"/>
    <deny send_interface="org.freedesktop.Hal.Device.LaptopPanel"/>
    <deny send_interface="org.freedesktop.Hal.Device.Volume"/>
    <deny send_interface="org.freedesktop.Hal.Device.Volume.Crypto"/>
  </policy>

  <policy user="root">
    <allow send_interface="org.freedesktop.Hal.Device.SystemPowerManagement"/>
    <allow send_interface="org.freedesktop.Hal.Device.VideoAdapterPM"/>
    <allow send_interface="org.freedesktop.Hal.Device.LaptopPanel"/>
    <allow send_interface="org.freedesktop.Hal.Device.Volume"/>
    <allow send_interface="org.freedesktop.Hal.Device.Volume.Crypto"/>
  </policy>

  <policy group="plugdev">
    <allow send_interface="org.freedesktop.Hal.Device.SystemPowerManagement"/>
    <allow send_interface="org.freedesktop.Hal.Device.VideoAdapterPM"/>
    <allow send_interface="org.freedesktop.Hal.Device.LaptopPanel"/>
    <allow send_interface="org.freedesktop.Hal.Device.Volume"/>
    <allow send_interface="org.freedesktop.Hal.Device.Volume.Crypto"/>
  </policy>

</busconfig>