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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Thank you for taking the time to file a bug report on this issue.

However, given the number of bugs that the Kernel Team receives during
any development cycle it is impossible for us to review them all.
Therefore, we occasionally resort to using automated bots to request
further testing. This is such a request.

  With the recent release of this Ubuntu release, would like to confirm
if this bug is still present. Please test again with the newer kernel
and indicate in the bug if this issue still exists or not.

You can update to the latest development kernel by simply running the
following commands in a terminal window:

    sudo apt-get update
    sudo apt-get dist-upgrade

If the bug still exists, change the bug status from Incomplete to
Confirmed. If the bug no longer exists, change the bug status from
Incomplete to Fix Released.

If you want this bot to quit automatically requesting kernel tests, add
a tag named: bot-stop-nagging.

 Thank you for your help, we really do appreciate it.


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

** Tags added: kernel-request-3.13.0-24.46

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https://bugs.launchpad.net/bugs/1296208

Title:
  8086:0a16 [HP EliteBook 850 G1 Notebook PC] Backlight controls not
  working

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Backlight control does not work, but there are entries in /sys/class/backlight.
  This is a new laptop, I have not tried any previous kernel versions. Hotkeys do not change the brightness but do cause the OSD to pop up indicating what the brightness should be. Brightness applet does not work.

  WORKAROUND: Adding the kernel parameter "acpi_backlight=vendor" now
  allows both the hotkeys and the brightness applet to modify the
  brightness.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-19-generic 3.13.0-19.39
  ProcVersionSignature: Ubuntu 3.13.0-19.39-generic 3.13.6
  Uname: Linux 3.13.0-19-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  useradmin   3496 F.... pulseaudio
   /dev/snd/controlC0:  useradmin   3496 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sat Mar 22 22:52:23 2014
  HibernationDevice: RESUME=UUID=a3e237f6-10cb-43a3-b9ed-ecfbc16de751
  InstallationDate: Installed on 2014-03-22 (1 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
  MachineType: Hewlett-Packard HP EliteBook 850 G1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-19-generic root=UUID=1209f2bc-bc3e-44ae-bf60-8c0bcb5cfb1e ro access=m2 quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-19-generic N/A
   linux-backports-modules-3.13.0-19-generic  N/A
   linux-firmware                             1.126
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/19/2014
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L71 Ver. 01.08
  dmi.board.name: 198F
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 15.54
  dmi.chassis.asset.tag: CNU345C1WF
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrL71Ver.01.08:bd02/19/2014:svnHewlett-Packard:pnHPEliteBook850G1:pvrA3009DD10303:rvnHewlett-Packard:rn198F:rvrKBCVersion15.54:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 850 G1
  dmi.product.version: A3009DD10303
  dmi.sys.vendor: Hewlett-Packard

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