[Bug 1232952] Re: Brightness controls do not change brightness

[micred]

I found a workaround here:
http://ubuntuforums.org/showthread.php?t=2181534

create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the following content:
Code:
Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"

EndSection
...and log out and back in again

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https://bugs.launchpad.net/bugs/1232952

Title:
  Brightness controls do not change brightness

Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  When using the brigtness controls i cannot change brightness

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: xorg 1:7.7+1ubuntu5
  ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2
  Uname: Linux 3.11.0-9-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.12.5-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Sun Sep 29 19:24:44 2013
  DistUpgraded: Fresh install
  DistroCodename: saucy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0106] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3975]
  InstallationDate: Installed on 2013-09-28 (1 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
  MachineType: LENOVO 1068BAU
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-9-generic.efi.signed root=UUID=b3739aad-4814-4571-a223-2d43fd22dd1e ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/27/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 44CN43WW
  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:bvr44CN43WW:bd10/27/2011:svnLENOVO:pn1068BAU:pvrLenovoB570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
  dmi.product.name: 1068BAU
  dmi.product.version: Lenovo B570
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.10+13.10.20130927.1-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.46-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu9
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
  xserver.bootTime: Sun Sep 29 19:03:54 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 826 
   vendor                                     LGD
  xserver.version: 2:1.14.2.901-2ubuntu6

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