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[Bug 1416186] Re: Periodically loss of backlight control

 

Jonathan Brier, could you please test the latest upstream kernel
available from the very top line at the top of the page (the release
names are irrelevant for testing, and please do not test the daily
folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will
allow additional upstream developers to examine the issue.

If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where XY and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results.

** Tags added: vivid

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

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https://bugs.launchpad.net/bugs/1416186

Title:
  Periodically loss of backlight control

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Periodically there is a loss of control of the backlight control where
  trying to brighten the screen or dim it with the keyboard controls
  does not function and remains in its current state.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xorg 1:7.7+7ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2
  Uname: Linux 3.16.0-29-generic x86_64
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.7-0ubuntu8.1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Thu Jan 29 21:05:25 2015
  DistUpgraded: Fresh install
  DistroCodename: utopic
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8650G] [1002:990b] (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:198a]
   Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8670A/8670M/8750M] [1002:6600] (rev ff) (prog-if ff)
  InstallationDate: Installed on 2015-01-29 (0 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20141015)
  MachineType: Hewlett-Packard HP ENVY TS 15 Notebook PC
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-29-generic.efi.signed root=UUID=1cc26cb0-3476-4abf-a12e-acac53ba8537 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/06/2014
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.18
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 198A
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 03.14
  dmi.chassis.asset.tag: 5CG32129MN
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsyde:bvrF.18:bd11/06/2014:svnHewlett-Packard:pnHPENVYTS15NotebookPC:pvr0888100000305B00000320000:rvnHewlett-Packard:rn198A:rvrKBCVersion03.14:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP ENVY TS 15 Notebook PC
  dmi.product.version: 0888100000305B00000320000
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Thu Jan 29 20:59:15 2015
  xserver.configfile: default
  xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension.
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.16.0-1ubuntu1.2
  xserver.video_driver: radeon

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References