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[Bug 990932] Re: Ubuntu 12.04 backlight problem of msi notebook with nvidia 8400m graphic card

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RealBezo, any news on this issue? Changing the hidden settings "change-
brightness-on-key-events" to false may fix the misbehavior.

http://docs.xfce.org/xfce/xfce4-power-manager/preferences#hidden_options

** Changed in: xfce4-power-manager (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/990932

Title:
  Ubuntu 12.04 backlight problem of msi notebook with nvidia 8400m
  graphic card

Status in “linux” package in Ubuntu:
  Incomplete
Status in “xfce4-power-manager” package in Ubuntu:
  Incomplete

Bug description:
  Hello, i have a msi ex600 laptop and just installed xubuntu 12.04 precise pangolin. But i have a problem with my backlight. At first i could not set properly my backlight via function keys, when i tried to set it, it was going to the maximum brightness always , but later i googled the problem and added to /etc/X11/xorg.conf file
  Section "Device"
   Identifier	"Default Device"
   Option  "RegistryDwords" "EnableBrightnessControl=1"
   Option	"NoLogo"	"True"
  EndSection

  this section.
  Now i can properly set my backlight on login screen, it works as normal but when i login to my account, i cannot change my backlight still as usual. if i try to increase one step it goes to maximum, if i try to decrease it goes to minimum, there is no option to change it step by step...

  i had a similar problem with xubuntu and ubuntu 11.10 , i solved it
  but i don't remember how i managed it.

  Thanks in advance...
  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  real       2481 F.... xfce4-volumed
                        real       2483 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf9ff8000 irq 46'
     Mixer name	: 'Realtek ALC888'
     Components	: 'HDA:10ec0888,14623fe9,00100001 HDA:11c11040,11c10001,00100200'
     Controls      : 39
     Simple ctrls  : 21
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=2852c7f5-47bc-4b80-a615-71b85f1a032f
  InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: Micro-Star International MSI Notebook EX600
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=en_US:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=4f91ecc8-63d9-4ec3-9e2a-b9a7a4e4f118 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-23-generic N/A
   linux-backports-modules-3.2.0-23-generic  N/A
   linux-firmware                            1.79
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  Tags:  precise precise
  Uname: Linux 3.2.0-23-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 08/06/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: A1636IMS V1.2C
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: MS-1636X
  dmi.board.vendor: MICRO-STAR INT'L CO.,LTD
  dmi.board.version: Ver 1.000
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: Micro-Star International
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA1636IMSV1.2C:bd08/06/2008:svnMicro-StarInternational:pnMSINotebookEX600:pvrVer1.000:rvnMICRO-STARINT'LCO.,LTD:rnMS-1636X:rvrVer1.000:cvnMicro-StarInternational:ct10:cvrToBeFilledByO.E.M.:
  dmi.product.name: MSI Notebook EX600
  dmi.product.version: Ver 1.000
  dmi.sys.vendor: Micro-Star International
  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  real       2481 F.... xfce4-volumed
                        real       2483 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf9ff8000 irq 46'
     Mixer name	: 'Realtek ALC888'
     Components	: 'HDA:10ec0888,14623fe9,00100001 HDA:11c11040,11c10001,00100200'
     Controls      : 39
     Simple ctrls  : 21
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=2852c7f5-47bc-4b80-a615-71b85f1a032f
  InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: Micro-Star International MSI Notebook EX600
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=en_US:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=4f91ecc8-63d9-4ec3-9e2a-b9a7a4e4f118 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-23-generic N/A
   linux-backports-modules-3.2.0-23-generic  N/A
   linux-firmware                            1.79
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  Tags:  precise precise
  Uname: Linux 3.2.0-23-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 08/06/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: A1636IMS V1.2C
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: MS-1636X
  dmi.board.vendor: MICRO-STAR INT'L CO.,LTD
  dmi.board.version: Ver 1.000
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: Micro-Star International
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA1636IMSV1.2C:bd08/06/2008:svnMicro-StarInternational:pnMSINotebookEX600:pvrVer1.000:rvnMICRO-STARINT'LCO.,LTD:rnMS-1636X:rvrVer1.000:cvnMicro-StarInternational:ct10:cvrToBeFilledByO.E.M.:
  dmi.product.name: MSI Notebook EX600
  dmi.product.version: Ver 1.000
  dmi.sys.vendor: Micro-Star International

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