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[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

does this work with 15.10 or xenial?

** Package changed: xserver-xorg-video-ati-lts-raring (Ubuntu) =>
xserver-xorg-video-ati (Ubuntu)

** Changed in: xserver-xorg-video-ati (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1264272

Title:
  [HP Pavilion 15] Brightness cannot be adjusted with the radeon driver

Status in xserver-xorg-video-ati package in Ubuntu:
  Incomplete

Bug description:
  CID: 201306-13641 HP Pavilion 15

  Steps:
  1. Install 12.04.3 + updates (3.8.0-34), boot to desktop
  2. Try to adjust screen brightness by the hotkeys
  3. Try to adjust screen brightness by the "Brightness and Lock" applet

  Expected Results:
  * Brightness could be adjusted.

  Actual Results:
  * The birghtness level indicator will change, but the brightness won't.

  Workaround:
  Install the proprietart fglrx driver, however, bug 1264259 will make both of these two bugs become blockers

  Debugging information:
  $ ls /sys/class/backlight
  acpi_video0  acpi_video1  radeon_bl0

  $ grep -r . /proc/acpi 
  /proc/acpi/button/lid/LID/state:state:      open
  grep: /proc/acpi/event: Permission denied
  /proc/acpi/wakeup:Device	S-state	  Status   Sysfs node
  /proc/acpi/wakeup:PB5	  S5	*disabled  pci:0000:00:05.0
  /proc/acpi/wakeup:XPDV	  S5	*enabled   pci:0000:03:00.0
  /proc/acpi/wakeup:OHC1	  S3	*enabled   pci:0000:00:12.0
  /proc/acpi/wakeup:OHC2	  S3	*enabled   pci:0000:00:13.0
  /proc/acpi/wakeup:EHC1	  S3	*enabled   pci:0000:00:12.2
  /proc/acpi/wakeup:EHC2	  S3	*enabled   pci:0000:00:13.2
  /proc/acpi/wakeup:XHC0	  S3	*enabled   pci:0000:00:10.0
  /proc/acpi/wakeup:KBC0	  S3	*enabled   pnp:00:06
  /proc/acpi/wakeup:PS2M	  S3	*disabled  pnp:00:07

  $ dmesg | grep 'ACPI: Video' 
  [    9.618209] ACPI: Video Device [VGA] (multi-head: yes  rom: no  post: no)
  [    9.619751] ACPI: Video Device [VGA1] (multi-head: yes  rom: no  post: no)

  $ cat /proc/version
  Linux version 3.8.0-34-generic (buildd@toyol) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #49~precise1-Ubuntu SMP Wed Nov 13 18:05:00 UTC 2013

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: xserver-xorg-video-radeon-lts-raring 1:7.1.0-0ubuntu2~precise1
  ProcVersionSignature: Ubuntu 3.8.0-34.49~precise1-generic 3.8.13.12
  Uname: Linux 3.8.0-34-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Thu Dec 26 05:34:31 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: xserver-xorg-video-ati-lts-raring
  UpgradeStatus: No upgrade log present (probably fresh install)

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