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[Launchpad Bug Tracker <588877@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 540112 ***
    https://bugs.launchpad.net/bugs/540112

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

** Changed in: nvidia-graphics-drivers (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/588877

Title:
  Thinkpad T510 [NVS 3100M] display brightness can't be changed

Status in nvidia-graphics-drivers package in Ubuntu:
  Confirmed

Bug description:
  The Hotkeys work fine and the value in
  /proc/acpi/video/VID1/LCD0/brightness 
  can be changed fine, but the display brightness stays at 100%.

  dmesg shows:
  [   14.757864] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
  [   14.757865] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: linux-image-2.6.34-5-generic 2.6.34-5.13
  Regression: No
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.34-5.13-generic 2.6.34
  Uname: Linux 2.6.34-5-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.22.1.
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf2420000 irq 32'
     Mixer name	: 'Conexant ID 5069'
     Components	: 'HDA:14f15069,17aa218b,00100302'
     Controls      : 6
     Simple ctrls  : 4
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 16'
     Mixer name	: 'Nvidia GT21x HDMI'
     Components	: 'HDA:10de000b,10de0101,00100100'
     Controls      : 16
     Simple ctrls  : 4
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6MHT35WW-1.10'
     Mixer name	: 'ThinkPad EC 6MHT35WW-1.10'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [off]
  Date: Wed Jun  2 20:47:47 2010
  HibernationDevice: RESUME=UUID=625759c5-c92f-456d-86d4-df014615c223
  InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
  MachineType: LENOVO 4349W1R
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.34-5-generic root=UUID=66934ff0-c70a-465d-a34d-24aca2ab5e96 ro quiet splash
  ProcEnviron:
   LANGUAGE=en_US.UTF-8
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  RelatedPackageVersions: linux-firmware 1.35
  SourcePackage: linux
  dmi.bios.date: 04/21/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6MET55WW (1.18 )
  dmi.board.name: 4349W1R
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6MET55WW(1.18):bd04/21/2010:svnLENOVO:pn4349W1R:pvrThinkPadT510:rvnLENOVO:rn4349W1R:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4349W1R
  dmi.product.version: ThinkPad T510
  dmi.sys.vendor: LENOVO

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