brightness not work correctly on eee pc

[rellai]

if windose 7 to maximum brightness. then reboot then everything is OK. You can set maximum brightness. If after reboot of Ubuntu in Ubntu. then the level of intensity that was at a minimum - is maximized. and the brightness decreases from this level. ie if you set it on the low level to discern that what is at all unrealistic.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+10ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Sun Mar 18 12:05:01 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation N10 Family Integrated Graphics Controller [8086:a011] (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
   Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
MachineType: ASUSTeK Computer INC. 1001PX
ProcEnviron:
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic root=UUID=67f578b6-5d11-4779-a6c1-e345dbf01feb ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/18/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1201
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1001PX
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1201:bd02/18/2011:svnASUSTeKComputerINC.:pn1001PX:pvrx.x:rvnASUSTeKComputerINC.:rn1001PX:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1001PX
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
version.compiz: compiz 1:0.9.7.0+bzr3035-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu34
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Bryce Harrington (bryce)]

Hi rellai,
Hmm... I'm not sure I totally understand your description of the problem. Could you please elaborate and clarify? You may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html or the Ubuntu-X bug reporting guidelines at http://wiki.ubuntu.com/X/Reporting .

[rellai (rellai-yandex)]

Hi, Bryce
I can't speak english very well, that's why it is difficult to me to explain some things correctly

After switching on the netbook and booting ubuntu, I reduced the screen brightness to minimum. After the second reboot the netbook have retained fixed brightness as I have set before the second reboot. Now the operating system considers that the new reduced level of brightness is a maximum level, and ubuntu does not allow to increase the brightness to the origin high level. After restarting the netbook by switching it off and on the fault disappears.

[Bryce Harrington (bryce)]

Ah, thank you, that's clearer.

X.org does not manage the brightness settings directly itself (although the kernel video drivers do provide it as an interface.) It is possible this is a problem in the settings service. Reassigning.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Laryllan (laryllan)]

I have the same problem on an eeePC 1215N, Ubuntu 13.04 32 bits.

I found a workaround to get maximum brightness back:
sudo setpci -s 00:02.0 f4.b=ff

It resets the maximum brightness to maximum.
If it does not work for you, try another PCI device (find the adress with lspci), like
sudo setpci -s 00:02.1 f4.b=ff