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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1324529

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1324529

Title:
  Backlight not adjustable

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Running 14.04, just upgraded. I can no longer adjust my backlight on
  my ThinkPad T530. I am attaching a number of files as requested in
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight. See also:
  http://askubuntu.com/questions/473660/brightness-keys-no-longer-work

  Note that /sys/class/backlight is empty unless acpi_backlight=vendor
  is set.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-27-generic 3.13.0-27.50
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  eli        3150 F.... pulseaudio
  CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
  Date: Thu May 29 08:43:12 2014
  InstallationDate: Installed on 2012-11-02 (572 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 2359CTO
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago)
  WifiSyslog:
   
  dmi.bios.date: 09/13/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G4ET62WW (2.04 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2359CTO
  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:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2359CTO
  dmi.product.version: ThinkPad T530
  dmi.sys.vendor: LENOVO

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