** Tags added: regression-update

** Description changed:

  FN-Keys don't work for me on my ThinkPad T430.
  
  When i'm on battery mode the screen does not dim down to save power,
- even with the workaround.
+ even not with the workaround.
  
  The problem exists since the release of Ubuntu 13.04
  
  My actual Kernel: 3.8.0-22-generic
  
  For the T430s the problem seems to be fixed:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098216
  
  WORKAROUND:
  
  Add to /etc/default/grub
  in the variable "GRUB_CMDLINE_LINUX_DEFAULT":
  
  acpi_osi=\"!Windows 2012\"
  
  e.g:
  
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\"!Windows 2012\""
  
  Then run "sudo update-grub".
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-22-generic 3.8.0-22.33
  ProcVersionSignature: Ubuntu 3.8.0-22.33-generic 3.8.11
  Uname: Linux 3.8.0-22-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  felix      2436 F.... pulseaudio
   /dev/snd/controlC0:  felix      2436 F.... pulseaudio
   /dev/snd/controlC1:  felix      2436 F.... pulseaudio
  Date: Fri May 24 17:05:25 2013
  HibernationDevice: RESUME=UUID=a3e1a0e4-da74-4961-a4df-d5a5ccae333d
  InstallationDate: Installed on 2013-05-22 (1 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: LENOVO 2349D17
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-22-generic 
root=UUID=c3662fb4-16b3-4a1d-808d-9530ba42ab52 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-22-generic N/A
   linux-backports-modules-3.8.0-22-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/22/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G1ET94WW (2.54 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2349D17
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrG1ET94WW(2.54):bd04/22/2013:svnLENOVO:pn2349D17:pvrThinkPadT430:rvnLENOVO:rn2349D17:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2349D17
  dmi.product.version: ThinkPad T430
  dmi.sys.vendor: LENOVO

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https://bugs.launchpad.net/bugs/1183856

Title:
  Brightness control on Lenovo ThinkPad T430 does not work.

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