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[Bug 1370225] Re: Screen Backlight on Sony Vaio SVE171G12L

 

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.17 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc5-utopic/


** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1370225

Title:
  Screen Backlight on Sony Vaio SVE171G12L

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  acpi backlight driver didn't change brightness, but intel_backlight did
  hotkeys were not mapped to intel_backlight
  after much google grep'ing the only instructions that worked getting the connection were https://wiki.ubuntu.com/Kernel/Debugging/Backlight#Intel_HD_Graphic_Controllers
  (adding 80-backlight.conf)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-35-generic 3.13.0-35.62
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pixnbits   1820 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Sep 16 12:53:34 2014
  HibernationDevice: RESUME=UUID=91db77a4-426f-4e00-ab65-6d360d66fb8e
  InstallationDate: Installed on 2014-09-11 (5 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Sony Corporation SVE17132CXB
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed root=UUID=04da7c66-3e8f-4e0f-be89-b76c4123092b ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-35-generic N/A
   linux-backports-modules-3.13.0-35-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/13/2012
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: R0160D6
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnInsydeCorp.:bvrR0160D6:bd11/13/2012:svnSonyCorporation:pnSVE17132CXB:pvrC904W99J:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: SVE17132CXB
  dmi.product.version: C904W99J
  dmi.sys.vendor: Sony Corporation

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