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[Launchpad Bug Tracker <1223421@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1223421

Title:
  [Lenovo S431, 531, S5]: Brightness keys to not function properly.

Status in linux package in Ubuntu:
  Expired

Bug description:
  [Problem]:

  Pushing the brightness "down" key causes the brightess to immediately
  go to a value of 0 yet the actual brightness has not change on the
  screen.

  Pushing brightness "up" causes the brightness value to go up to around
  5% and immediately sets the actual corresponding brightness level on
  the display.

  At this point pressing the brightness "up" or "down" keys causes the
  brightness slider to jump between 0 and 5% but will not go any higher
  value setting.

  You have to open gnome-control-center "brightness and lock" to reset
  the brightness to desired value.

  This particular bug is present on a few recent lenovos models.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.8.0-29-generic 3.8.0-29.42~precise1 [modified: boot/vmlinuz-3.8.0-29-generic]
  ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
  Uname: Linux 3.8.0-29-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.4
  Architecture: amd64
  Date: Tue Sep 10 11:45:00 2013
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-lts-raring
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-29-generic.
  ApportVersion: 2.0.1-0ubuntu17.4
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1563 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xe2810000 irq 48'
     Mixer name	: 'Intel PantherPoint HDMI'
     Components	: 'HDA:10ec0269,17aa0001,00100203 HDA:80862806,80860101,00100000'
     Controls      : 36
     Simple ctrls  : 12
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
     Mixer name	: 'ThinkPad EC (unknown)'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=fbd820f1-0c28-488a-b1a5-90e425ff897e
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  MachineType: LENOVO 20AX25C
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic root=UUID=5cea22e2-4925-4f99-8469-1af7456106b3 ro quiet splash initcall_debug vt.handoff=7
  ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-29-generic N/A
   linux-backports-modules-3.8.0-29-generic  N/A
   linux-firmware                            1.79.6
  Tags:  precise running-unity
  Uname: Linux 3.8.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 03/26/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: HFET25WW (1.02 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AX25C
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 STD PRC DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrHFET25WW(1.02):bd03/26/2013:svnLENOVO:pn20AX25C:pvrThinkPadS3-S431:rvnLENOVO:rn20AX25C:rvrWin8STDPRCDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AX25C
  dmi.product.version: ThinkPad S3-S431
  dmi.sys.vendor: LENOVO

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