roberto@jeremy:~$ cat /etc/init.d/macbook-hal-device
#!/bin/sh

. /lib/lsb/init-functions

case "$1" in
start)
  hal-device -a /org/freedesktop/Hal/devices/macbook_brightness &> /dev/null << EOF
org.freedesktop.Hal.Device.LaptopPanel.method_execpaths = {'macbook-lcd-set-brightness', 'macbook-lcd-get-brightness'}
org.freedesktop.Hal.Device.LaptopPanel.method_signatures = {'i', ''}
org.freedesktop.Hal.Device.LaptopPanel.method_names = {'SetBrightness', 'GetBrightness'}
info.interfaces = {'org.freedesktop.Hal.Device.LaptopPanel'}
info.capabilities = {'laptop_panel'}
laptop_panel.num_levels = 10 (int)
info.product = 'Macbook LCD Panel'
info.category = 'laptop_panel'
info.parent = '/org/freedesktop/Hal/devices/computer'
EOF
  ;;
stop)
  hal-device -r /org/freedesktop/Hal/devices/macbook_brightness &> /dev/null || true
  ;;
restart|reload|force-reload)
  ;;
esac