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[Bug 1314263] [NEW] Backlight control does not work, but there are entries in /sys/class/backlight.

 

Public bug reported:

I was trying to attach all the debugging information you have requested
in https://wiki.ubuntu.com/Kernel/Debugging/Backlight but of course I
can attach only one file. "You had only one job !" god damn it ! So here
you have it packed - just as you dont like.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic]
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  krzysiek   1727 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 29 17:53:20 2014
HibernationDevice: RESUME=UUID=98bb6fc0-55d5-4f87-8ee0-b29de4104441
InstallationDate: Installed on 2014-04-28 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Acer Aspire 5830TG
ProcFB:
 0 inteldrmfb
 1 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=aa11c6e0-57f7-4803-a66d-18ffc0a43790 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-24-generic N/A
 linux-backports-modules-3.13.0-24-generic  N/A
 linux-firmware                             1.127
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2012
dmi.bios.vendor: Acer
dmi.bios.version: V1.12
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: JM50_HR
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.12
dmi.modalias: dmi:bvnAcer:bvrV1.12:bd08/14/2012:svnAcer:pnAspire5830TG:pvrV1.12:rvnAcer:rnJM50_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.12:
dmi.product.name: Aspire 5830TG
dmi.product.version: V1.12
dmi.sys.vendor: Acer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

** Attachment added: "debuglog.zip"
   https://bugs.launchpad.net/bugs/1314263/+attachment/4100451/+files/debuglog.zip

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https://bugs.launchpad.net/bugs/1314263

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

Status in “linux” package in Ubuntu:
  New

Bug description:
  I was trying to attach all the debugging information you have
  requested in https://wiki.ubuntu.com/Kernel/Debugging/Backlight but of
  course I can attach only one file. "You had only one job !" god damn
  it ! So here you have it packed - just as you dont like.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic]
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  krzysiek   1727 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Apr 29 17:53:20 2014
  HibernationDevice: RESUME=UUID=98bb6fc0-55d5-4f87-8ee0-b29de4104441
  InstallationDate: Installed on 2014-04-28 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Acer Aspire 5830TG
  ProcFB:
   0 inteldrmfb
   1 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=aa11c6e0-57f7-4803-a66d-18ffc0a43790 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/14/2012
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.12
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: JM50_HR
  dmi.board.vendor: Acer
  dmi.board.version: Base Board Version
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.12
  dmi.modalias: dmi:bvnAcer:bvrV1.12:bd08/14/2012:svnAcer:pnAspire5830TG:pvrV1.12:rvnAcer:rnJM50_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.12:
  dmi.product.name: Aspire 5830TG
  dmi.product.version: V1.12
  dmi.sys.vendor: Acer

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