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[Bug 1258058] Re: Brightness control no effect on screen


Q:Did this issue occur in a previous version of Ubuntu, or is this a new issue?
A:This is first and only version I installed on this laptop

Q:Would it be possible for you to test the latest upstream kernel?
A:It would be possible if you can provide me step-by-step instructions how to do that exactly, I'm Linux noob. Please include fallback instructions to current setup (in case I'm not able to boot)

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  Brightness control no effect on screen

Status in “linux” package in Ubuntu:

Bug description:
  Brightness control no effect on screen, I managed to get control over brightness by using xbacklight.
  My issue (laptop and everything else) is exactly the same as this one http://ubuntuforums.org/showthread.php?t=2167180

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
   /dev/snd/controlC1:  radenkovich   2284 F.... pulseaudio
   /dev/snd/controlC0:  radenkovich   2284 F.... pulseaudio
  Date: Thu Dec  5 09:45:30 2013
  HibernationDevice: RESUME=UUID=ea9a6ac1-13ea-4060-9ef9-60a3309bd921
  InstallationDate: Installed on 2013-11-11 (23 days ago)
  InstallationMedia: This
  MachineType: LENOVO 20217
  MarkForUpload: True
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=aec56d0c-f753-4e40-948a-34e69d7dfca6 ro "acpi_osi=!Windows 2012"
   linux-restricted-modules-3.11.0-14-generic N/A
   linux-backports-modules-3.11.0-14-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/22/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 74CN41WW(V2.07)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: VIQY0Y1
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900004STD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo IdeaPad Y510P
  dmi.modalias: dmi:bvnLENOVO:bvr74CN41WW(V2.07):bd08/22/2013:svnLENOVO:pn20217:pvrLenovoIdeaPadY510P:rvnLENOVO:rnVIQY0Y1:rvr31900004STD:cvnLENOVO:ct10:cvrLenovoIdeaPadY510P:
  dmi.product.name: 20217
  dmi.product.version: Lenovo IdeaPad Y510P
  dmi.sys.vendor: LENOVO

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