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[Bug 1354710] Re: Backlight control does not work, but there are entries in /sys/class/backlight. Lenovo B570

 

could you recheck the kernels are in the right folders as

there are no test kernels in a50188dae3089dcd15a6ae793528c157680891f1
when there should be one  (according to the bisect log)

and there are two sets in 94a409319561ec1847fd9bf996a2d5843ad00932

so I am unsure if  the folders the kernels are in reflect the commits
accurately

will  test once clarified

thanks

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https://bugs.launchpad.net/bugs/1354710

Title:
  Backlight control does not work, but there are entries in
  /sys/class/backlight. Lenovo B570

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Laptop model: Lenovo B570
  package version: Ubuntu 3.13.0-32.57-generic 3.13.11.4

  I expected the keys for changeing the backlight brightness to work
  they had no effect on the backlight

  further details in attatched Tar

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic i686
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  x321x321   1977 F.... pulseaudio
  Date: Sat Aug  9 16:11:34 2014
  HibernationDevice: RESUME=UUID=61c2c6a6-4b45-4af0-941a-dadf05ad0aba
  InstallationDate: Installed on 2014-07-31 (8 days ago)
  InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140723)
  MachineType: LENOVO 1068FJG
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-32-generic root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=7
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/11/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 44CN36WW
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Emerald Lake
  dmi.board.vendor: LENOVO
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnLENOVO:bvr44CN36WW:bd07/11/2011:svnLENOVO:pn1068FJG:pvrLenovoB570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
  dmi.product.name: 1068FJG
  dmi.product.version: Lenovo B570
  dmi.sys.vendor: LENOVO

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