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[xor <1280927@xxxxxxxxxxxxxxxxxx>]

Also affects my Thinkpad T61p on:

- Kubuntu amd64 14.04
- Nvidia drivers package "nvidia-331" Version: 331.38-0ubuntu7
- Kernel 3.13.0-29-generic #53-Ubuntu SMP

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https://bugs.launchpad.net/bugs/1280927

Title:
  Brightness controls do not work on Thinkpad T61

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I have the nvidia graphics drivers installed on my laptop and the
  brightess control doesn't work. I will give more info if asked.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-8-generic 3.13.0-8.28 [modified: boot/vmlinuz-3.13.0-8-generic]
  ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
  Uname: Linux 3.13.0-8-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.2-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jack       3366 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sun Feb 16 20:05:42 2014
  HibernationDevice: RESUME=UUID=dca68f85-f13a-46ac-a6f1-464953ec1f41
  InstallationDate: Installed on 2014-02-16 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140216)
  MachineType: LENOVO 7663Y1C
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic root=UUID=8c5abef2-b566-4be2-a234-648e209ce22c ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-8-generic N/A
   linux-backports-modules-3.13.0-8-generic  N/A
   linux-firmware                            1.124
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/18/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7LETC9WW (2.29 )
  dmi.board.name: 7663Y1C
  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:bvr7LETC9WW(2.29):bd03/18/2011:svnLENOVO:pn7663Y1C:pvrThinkPadT61:rvnLENOVO:rn7663Y1C:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 7663Y1C
  dmi.product.version: ThinkPad T61
  dmi.sys.vendor: LENOVO

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