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[Bug 1506914] Re: Screen brightness not working using keyboard shortcut fn+F5/F6 not working.

 

** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
upstream-4.4-rc4

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https://bugs.launchpad.net/bugs/1506914

Title:
  Screen brightness not working using keyboard shortcut fn+F5/F6 not
  working.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  
  The fix is editing /etc/default/grub and replacing 

   GRUB_CMDLINE_LINUX_DEFAULT=""
  with
   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

  run $ sudo update-grub
  reboot

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
  Uname: Linux 3.19.0-30-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.17.2-0ubuntu1.5
  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: Fri Oct 16 17:27:47 2015
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroVariant: ubuntu
  DkmsStatus: bbswitch, 0.7, 3.19.0-30-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:11cd]
     Subsystem: ASUSTeK Computer Inc. Device [1043:11cd]
  JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found.
  MachineType: ASUSTeK COMPUTER INC. G550JK
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=9a6cce6e-ddfb-40c7-a64c-823140602164 ro quiet splash acpi_backlight=vendor vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/11/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: G550JK.204
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: G550JK
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG550JK.204:bd08/11/2014:svnASUSTeKCOMPUTERINC.:pnG550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: G550JK
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.
  version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Sat Oct 10 11:46:59 2015
  xserver.configfile: default
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
   NOUVEAU(G0): [GLAMOR] failed to initialise EGL
   NOUVEAU(G0): Error creating GPU channel: -19
   NOUVEAU(G0): Error initialising acceleration.  Falling back to NoAccel
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               12876 
   vendor                                     SDC
  xserver.version: 2:1.17.1-0ubuntu3.1

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