dell brightness: 2 steps when I use the keys instead of 1

[Nicolò Chieffo]

Binary package hint: gnome-power-manager

I have a Latitude E6400 dell laptop. When I use the brightness keys, the brightness is increaed/decreased by 2 steps instead of 1.
lshal show this about brightness:
udi = '/org/freedesktop/Hal/devices/dell_lcd_panel'
  info.addons = {'hald-addon-dell-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/platform_dcdbas' (string)
  info.product = 'Dell Laptop Panel' (string)
  info.subsystem = 'unknown' (string)
  info.udi = '/org/freedesktop/Hal/devices/dell_lcd_panel' (string)
  laptop_panel.access_method = 'custom' (string)
  laptop_panel.brightness_in_hardware = true (bool)
  laptop_panel.num_levels = 16 (0x10) (int)

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: gnome-power-manager 2.24.2-2ubuntu4
ProcEnviron:
 PATH=(custom, user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-power-manager
Uname: Linux 2.6.28-8-generic i686

[Nicolò Chieffo (yelo3)]

This is fixed modprobing the module video with the parameter
brightness_switch_enabled=0

BTW HAL detects 2 laptop_panel devices, this is the other one:
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 = 'general' (string)
 laptop_panel.brightness_in_hardware = false (bool)
 laptop_panel.num_levels = 16 (0x10) (int)
 linux.hotplug_type = 2 (0x2) (int)
 linux.subsystem = 'backlight' (string)
 linux.sysfs_path = '/sys/devices/virtual/backlight/acpi_video0' (string)

[dino99 (9d9)]

http://www.freedesktop.org/wiki/Software/hal/