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[ML <1207487@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1098216 ***
    https://bugs.launchpad.net/bugs/1098216

** This bug has been marked a duplicate of bug 1098216
   Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and X1 Carbon

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https://bugs.launchpad.net/bugs/1207487

Title:
  Brightness Controls work but brightness doesnt change

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I am unable to change the brigthness of the screen, the controls work
  properly but changing the brightness level has no impact on the screen
  brightness. It feels like the old intel brightness regression bug. The
  brightness is always at the full level.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: xorg 1:7.7+1ubuntu5
  ProcVersionSignature: Ubuntu 3.10.0-5.15-generic 3.10.2
  Uname: Linux 3.10.0-5-generic x86_64
  ApportVersion: 2.11-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  Date: Fri Aug  2 00:35:28 2013
  DistUpgraded: Fresh install
  DistroCodename: saucy
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.10.0-3-generic, x86_64: installed
   bbswitch, 0.7, 3.10.0-4-generic, x86_64: installed
   bbswitch, 0.7, 3.10.0-5-generic, x86_64: installed
   nvidia-304, 304.88, 3.10.0-4-generic, x86_64: installed
   nvidia-304, 304.88, 3.10.0-5-generic, x86_64: installed
  DpkgLog:
   
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:397d]
   NVIDIA Corporation GF108M [GeForce GT 520M] [10de:0df7] (rev ff) (prog-if ff)
  InstallationDate: Installed on 2013-06-02 (60 days ago)
  InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Alpha amd64 (20130601)
  MachineType: LENOVO HuronRiver Platform
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.10.0-5-generic root=UUID=f80879ea-b397-4778-bb59-f9fb5c8fa4ce ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/21/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 45CN38WW
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Emerald Lake
  dmi.board.vendor: LENOVO
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnLENOVO:bvr45CN38WW:bd10/21/2011:svnLENOVO:pnHuronRiverPlatform:pvrIdeapadZ570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
  dmi.product.name: HuronRiver Platform
  dmi.product.version: Ideapad Z570
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.45-2ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.4-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.4-0ubuntu3
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.2-0ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.9-0ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.8-0ubuntu1.1
  xserver.bootTime: Thu Aug  1 22:15:43 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.14.2-0ubuntu1
  xserver.video_driver: intel

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