ACPI video brightness not working(F7 F8)

[00oo00]

Binary package hint: gnome-power-manager

Brightness control not working with FN +F7(BRTN UP) FN+F8(BRTN DOWN). Tried different versions not working as well. I think this is a bug. And run into tty1 tried to get the two keycode but return nothing.

ProblemType: Bug
Architecture: i386
Date: Wed Mar 24 13:11:16 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: wl
Package: gnome-power-manager 2.28.1-0ubuntu1.3
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: gnome-power-manager
Uname: Linux 2.6.31-20-generic i686
XsessionErrors:
 (gnome-settings-daemon:1715): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1715): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:1822): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:1854): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (firefox:1959): GLib-WARNING **: g_set_prgname() called multiple times

[00oo00 (tommyapplechan)]

Hello, I have a problem with my Samsung notebook.
My Function Keys (Fn) that manage the brightness level are bios-controlled, because they work before Linux boot (in grub and in bios for example).
The problem is that they don't work after the boot. The only way to change the screen brightness is doing echo n>/proc/acpi/video/GFX0/DD03/brightness (where n is the desired brightness level).
I can't assign any function to the brightness fn keys (I think that's because they're bios controlled).

I tried 4 keystrokes doesn`t return keycodes. They`re FN+F7 FN+F8 FN+F9 FN+F10
I did dmesg|tail -5 command and it returns this below.

[ 80.440431] ata4.00: status: { DRDY ERR }
[ 133.093263] ACPI: Please implement acpi_video_bus_ROM_seq_show
[ 133.250579] ACPI: Please implement acpi_video_bus_ROM_seq_show
[ 134.123082] ACPI: Please implement acpi_video_bus_ROM_seq_show
[ 1333.281087] CE: hpet increasing min_delta_ns to 15000 nsec

when cat '/proc/acpi/video/GFX0/DD03/brightness it returns some values.

levels: 13 25 38 50 63 75 88 100
current: 63

[00oo00 (tommyapplechan)]

lsmod output
Module Size Used by
nls_utf8 1568 1
hfsplus 73632 1
nls_iso8859_1 3740 1
nls_cp437 5372 1
vfat 10716 1
fat 51452 1 vfat
binfmt_misc 8356 1
ppdev 6688 0
bridge 47952 0
stp 2272 1 bridge
bnep 12060 2
snd_hda_codec_realtek 235204 1
iptable_filter 3100 0
usbhid 38208 0
ip_tables 11692 1 iptable_filter
x_tables 16544 1 ip_tables
snd_hda_intel 25760 2
snd_hda_codec 84512 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 7456 1 snd_hda_codec
snd_pcm_oss 37504 0
snd_mixer_oss 16252 1 snd_pcm_oss
snd_pcm 76576 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_dummy 2816 0
snd_seq_oss 29504 0
snd_seq_midi 6688 0
snd_rawmidi 22400 1 snd_seq_midi
snd_seq_midi_event 7036 2 snd_seq_oss,snd_seq_midi
lib80211_crypt_tkip 8636 0
snd_seq 51280 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 21604 2 snd_pcm,snd_seq
snd_seq_device 7272 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
btusb 11856 2
psmouse 56500 0
serio_raw 5280 0
coretemp 5564 0
wl 1272936 0
lib80211 6432 2 lib80211_crypt_tkip,wl
snd 61444 18 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 7264 1 snd
snd_page_alloc 9156 2 snd_hda_intel,snd_pcm
lp 8964 0
parport 35340 2 ppdev,lp
fbcon 36640 72
tileblit 2460 1 fbcon
font 8124 1 fbcon
bitblit 5372 1 fbcon
softcursor 1756 1 bitblit
usb_storage 52768 2
r8169 32064 0
mii 5212 1 r8169
i915 226120 3
drm 160032 3 i915
i2c_algo_bit 5760 1 i915
intel_agp 27676 2 i915
agpgart 34988 2 drm,intel_agp
video 19380 1 i915
output 2780 1 video

[00oo00 (tommyapplechan)]

My dmesg boot info.

[00oo00 (tommyapplechan)]

My dmesg boot info.