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[Launchpad Bug Tracker <1087874@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1087874

Title:
  8086:0046 [Acer 3820T] Brightness control not working

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  "Backlight control does not work, but there are entries in /sys/class/backlight."
  - Neither fn+left/right nor system tools brightness control works.

  WORKAROUND: acpi_backlight=vendor

  WORKAROUND: With acpi_osi=Linux I can now control the brightness lever
  with the keys.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-19-generic 3.5.0-19.30
  ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
  Uname: Linux 3.5.0-19-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  diskdoc    2728 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Sat Dec  8 01:16:24 2012
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=11efe0be-9f52-4ee5-ae6c-7e025de38353
  InstallationDate: Installed on 2010-06-07 (914 days ago)
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
  MachineType: Acer Aspire 3820
  MarkForUpload: True
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=8b7cae99-dae3-4d14-bbd3-24f82a9e0b57 ro quiet splash rootflags=data=writeback acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-19-generic N/A
   linux-backports-modules-3.5.0-19-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: Upgraded to quantal on 2012-12-05 (2 days ago)
  dmi.bios.date: 10/27/2010
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: V1.19
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: JM31_CP
  dmi.board.vendor: Acer
  dmi.board.version: V1.19
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.19
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.19:bd10/27/2010:svnAcer:pnAspire3820:pvrV1.19:rvnAcer:rnJM31_CP:rvrV1.19:cvnAcer:ct10:cvrV1.19:
  dmi.product.name: Aspire 3820
  dmi.product.version: V1.19
  dmi.sys.vendor: Acer

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