benste@VAIO-FE31M:~$ smartdimmer -s 15
/**ok**/

benste@VAIO-FE31M:~$ hal-find-by-property --key info.category --string laptop_panel | xargs lshal -u udi = '/org/freedesktop/Hal/devices/computer_backlight'
  info.addons = {'hald-addon-generic-backlight'} (string list)
  info.capabilities = {'laptop_panel'} (string list)
  info.category = 'laptop_panel'  (string)
  info.interfaces = {'org.freedesktop.Hal.Device.LaptopPanel'} (string list)
  info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
  info.product = 'Generic Backlight Device'  (string)
  info.subsystem = 'backlight'  (string)
  info.udi = '/org/freedesktop/Hal/devices/computer_backlight'  (string)
  laptop_panel.access_method = 'sony-nvidia'  (string)
  laptop_panel.num_levels = 18  (0x12)  (int)
  linux.hotplug_type = 2  (0x2)  (int)
  linux.subsystem = 'backlight'  (string)
  linux.sysfs_path = '/sys/devices/virtual/backlight/sony'  (string)


benste@VAIO-FE31M:~$ less /usr/share/hal/fdi/policy/10osvendor/10-laptop-panel-mgmt-policy.fdi

<?xml version="1.0" encoding="UTF-8"?>

<deviceinfo version="0.2">

  <device>
    <match key="info.category" string="laptop_panel">
      <!-- only set if the laptop_panel.access_method is not custom -->
      <match key="laptop_panel.access_method" compare_ne="custom">
	<!-- for the generic sysfs interfaces -->
	<match key="linux.sysfs_path" exists="true">
	  <append key="info.addons" type="strlist">hald-addon-generic-backlight</append>
	</match>
	<!-- for all the procfs related brightness interfaces -->
	<match key="linux.sysfs_path" exists="false">
          <append key="info.interfaces" type="strlist">org.freedesktop.Hal.Device.LaptopPanel</append>

          <append key="org.freedesktop.Hal.Device.LaptopPanel.method_names" type="strlist">SetBrightness</append>
          <append key="org.freedesktop.Hal.Device.LaptopPanel.method_signatures" type="strlist">i</append>
          <append key="org.freedesktop.Hal.Device.LaptopPanel.method_argnames" type="strlist">brightness_value</append>
      	  <append key="org.freedesktop.Hal.Device.LaptopPanel.method_execpaths" type="strlist">hal-system-lcd-set-brightness</append>

          <append key="org.freedesktop.Hal.Device.LaptopPanel.method_names" type="strlist">GetBrightness</append>
          <append key="org.freedesktop.Hal.Device.LaptopPanel.method_signatures" type="strlist"></append>
          <append key="org.freedesktop.Hal.Device.LaptopPanel.method_argnames" type="strlist"></append>
	  <append key="org.freedesktop.Hal.Device.LaptopPanel.method_execpaths" type="strlist">hal-system-lcd-get-brightness</append>
        </match>
      </match>
    </match>
  </device>

</deviceinfo>