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[Jens <jens-launchpad.net@xxxxxxxxxxxxxxx>]

The BIOS update by Toshiba does not report to fix anything display related, so our internal IT does not allow me to update the BIOS. Besides, various Windows versions do not have this problem (there are other display issues on Windows, but a BIOS update is not allowed unless its changelog refers to changes regarding the internal display).
 
Is there anything else I can do to fix this?

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

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https://bugs.launchpad.net/bugs/1178205

Title:
  [Toshiba Tecra R850-19Z] Screen brightness not changable via applet or
  hotkeys in Ubuntu 12.04

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  By default the screen is very dark and almost unreadable. The Fn+F6/7
  hotkeys show the brightness applet but don't change the brightness.
  Attached info according to
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight below.

  WORKAROUND: acpi_backlight=vendor

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-41-generic-pae 3.2.0-41.66
  ProcVersionSignature: Ubuntu 3.2.0-41.66-generic-pae 3.2.42
  Uname: Linux 3.2.0-41-generic-pae i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.2
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1655 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xc4820000 irq 50'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:10ec0269,11790628,00100100 HDA:80862805,11790001,00100000'
     Controls      : 29
     Simple ctrls  : 11
  Date: Thu May  9 12:14:51 2013
  HibernationDevice: RESUME=UUID=add8fe24-1f1e-4ca7-a2d6-a0f40c03383f
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: TOSHIBA TECRA R850
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-41-generic-pae root=UUID=ffc754ea-32ed-4ae7-b471-bca82bd54afb ro elevator=deadline quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-41-generic-pae N/A
   linux-backports-modules-3.2.0-41-generic-pae  N/A
   linux-firmware                                1.79.4
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/25/2011
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 3.10
  dmi.board.asset.tag: 0000000000
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Version A0
  dmi.chassis.asset.tag: 0000000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: Version 1.0
  dmi.modalias: dmi:bvnTOSHIBA:bvrVersion3.10:bd08/25/2011:svnTOSHIBA:pnTECRAR850:pvrPT525E-043021GH:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: TECRA R850
  dmi.product.version: PT525E-043021GH
  dmi.sys.vendor: TOSHIBA

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