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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1377120

Title:
  Undocking notebook results in minimum brightness

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I've a X220 with 14.04 and In my setup I do have a docking station
  with an external monitor hooked up. Undocking my notebook darkens the
  notebook screen. Docking it again gives normal brightness and
  "undocking" again gives again regular brightness. So the problem
  occuse only the first time of undocking.

  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  This is the same issue as here
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1308674

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-36-generic 3.13.0-36.63
  ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
  Uname: Linux 3.13.0-36-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  adnc       2737 F.... pulseaudio
   /dev/snd/pcmC0D0p:   adnc       2737 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Fri Oct  3 13:41:38 2014
  HibernationDevice: RESUME=UUID=e24f10db-88ff-46e1-9e2c-15cb62ebb376
  InstallationDate: Installed on 2014-07-02 (92 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 4290C88
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-36-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-36-generic N/A
   linux-backports-modules-3.13.0-36-generic  N/A
   linux-firmware                             1.127.7
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/18/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET69WW (1.39 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4290C88
  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:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn4290C88:pvrThinkPadX220:rvnLENOVO:rn4290C88:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4290C88
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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