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[Bug 1182376] Re: [Dell XPS 13(L322X)] Brightness control does not work on this system

 

*** This bug is a duplicate of bug 1163720 ***
    https://bugs.launchpad.net/bugs/1163720

** Tags added: l322x

** This bug is no longer a duplicate of bug 954661
   backlight brightness not adjustable by default on Dell XPS 13

** This bug has been marked a duplicate of bug 1163720
   Brightness control broken on XPS13 with 3.8.0-16 and 3.8.0-22

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https://bugs.launchpad.net/bugs/1182376

Title:
  [Dell XPS 13(L322X)] Brightness control does not work on this system

Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  CID: 201209-11840

  Brightness control does not work on this system.

  The value of brightness level indicator could be changed correclty by pressing brightness control keys,
  and the brightness level could be changed in "Brightness and Lock" as well. 

  However, no matter how you change it, the actual brightness level of
  this system remain the same.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.5.0-23-generic 3.5.0-23.35~precise1
  ProcVersionSignature: Ubuntu 3.5.0-23.35~precise1-generic 3.5.7.2
  Uname: Linux 3.5.0-23-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC275 Analog [ALC275 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1414 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xd0510000 irq 45'
     Mixer name	: 'Intel PantherPoint HDMI'
     Components	: 'HDA:10ec0275,1028058b,00100008 HDA:80862806,80860101,00100000'
     Controls      : 26
     Simple ctrls  : 11
  Date: Tue May 21 17:00:46 2013
  HibernationDevice: RESUME=UUID=e1117f50-f722-4f91-91a1-7efa8efa1ce8
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  MachineType: Dell Inc. Dell System XPS L322X
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-23-generic root=UUID=c337bf57-bd43-47b6-800f-9becf83aa95b ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-23-generic N/A
   linux-backports-modules-3.5.0-23-generic  N/A
   linux-firmware                            1.79.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/22/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: T40
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrT40:bd01/22/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L322X
  dmi.sys.vendor: Dell Inc.

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