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[Shaun Duncan <1232459@xxxxxxxxxxxxxxxxxx>]

apport information

** Attachment added: "ProcCpuinfo.txt"
   https://bugs.launchpad.net/bugs/1232459/+attachment/3847218/+files/ProcCpuinfo.txt

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https://bugs.launchpad.net/bugs/1232459

Title:
  Brightness control broken for Dell XPS 13 on Raring 13.04 after kernel
  upgrade

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I've seen this problem in both kernels 3.8.0.30-generic and
  3.8.0.31-generic. It seems to be working without any problems in
  3.8.0.29-generic.

  Current version of intel packages:
  xserver-xorg-video-intel: 2:2.21.6-0ubuntu4.1
  libdrm-intel1: 2.4.43-0ubuntu1.1
  --- 
  ApportVersion: 2.9.2-0ubuntu8.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sduncan    1885 F.... pulseaudio
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=c4838fd3-7b17-4660-bcee-182637bc6e6d
  InstallationDate: Installed on 2013-08-13 (45 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Dell Inc. Dell System XPS L322X
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-31-generic.efi.signed root=UUID=d04e0f52-da13-4e30-9581-f0a8d2f32051 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-31-generic N/A
   linux-backports-modules-3.8.0-31-generic  N/A
   linux-firmware                            1.106
  Tags:  raring
  Uname: Linux 3.8.0-31-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 05/15/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: 0WG38X
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA09:bd05/15/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0WG38X:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L322X
  dmi.sys.vendor: Dell Inc.

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