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[Bug 706303] Re: LCD screen brightness is not adapted on AC/Battery state change

 

Theo band, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc5

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags added: latest-bios-v.135 needs-upstream-testing

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

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https://bugs.launchpad.net/bugs/706303

Title:
  LCD screen brightness is not adapted on AC/Battery state change

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Fn-left and Fn-right control the brightness correctly (with a nice indicator popup)
  The brightness slider in gnome-power-manager has no effect (It does seem to change the value in /proc/acpi/video/OVGA/DD02/brightness)
  xbacklight -set 50 does not work.
  setpci -s 00:02.0 F4.B=FF to 
  setpci -s 00:02.0 F4.B=00 controls the brightness over the entire range.
  I tried acpi_backlight=vendor as boot option but that does not make any difference (this used to be a workaround for 10.04)

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: xorg 1:7.5+6ubuntu3
  ProcVersionSignature: Ubuntu 2.6.35-24.42-generic-pae 2.6.35.8
  Uname: Linux 2.6.35-24-generic-pae i686
  Architecture: i386
  DRM.card0.DisplayPort.1:
   status: disconnected
   enabled: disabled
   dpms: On
   modes: 
   edid-base64:
  DRM.card0.DisplayPort.2:
   status: disconnected
   enabled: disabled
   dpms: On
   modes: 
   edid-base64:
  DRM.card0.HDMI_Type_A.1:
   status: disconnected
   enabled: disabled
   dpms: On
   modes: 
   edid-base64:
  DRM.card0.LVDS.1:
   status: connected
   enabled: enabled
   dpms: On
   modes: 1366x768
   edid-base64: AP///////wAGrzwhAAAAAAESAQOAHxF4Cgnll1dUkyciUFQAAAABAQEBAQEBAQEBAQEBAQEBIBxWgFAAIzAwIDYANa4QAAAYAAAADwAAAAAAAAAAAAAAAAAgAAAA/gBBVU8KICAgICAgICAgAAAA/gBCMTQwWFcwMiBWMSAKALI=
  DRM.card0.VGA.1:
   status: disconnected
   enabled: disabled
   dpms: On
   modes: 
   edid-base64:
  Date: Sat Jan 22 15:36:02 2011
  InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  MachineType: Acer Aspire 4810T
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-24-generic-pae root=/dev/mapper/vg-root_10.10 ro i8042.nomux quiet splash vga=792
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: xorg
  Symptom: display
  dmi.bios.date: 04/13/2010
  dmi.bios.vendor: INSYDE
  dmi.bios.version: V1.35
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire 4810T
  dmi.board.vendor: Acer
  dmi.board.version: Base Board Version
  dmi.chassis.type: 1
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnINSYDE:bvrV1.35:bd04/13/2010:svnAcer:pnAspire4810T:pvrV1.35:rvnAcer:rnAspire4810T:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
  dmi.product.name: Aspire 4810T
  dmi.product.version: V1.35
  dmi.sys.vendor: Acer
  glxinfo: Error: [Errno 2] No such file or directory
  system:
   distro:             Ubuntu
   codename:           maverick
   architecture:       i686
   kernel:             2.6.35-24-generic-pae
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  thba      20308 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xd4400000 irq 45'
     Mixer name	: 'Intel Cantiga HDMI'
     Components	: 'HDA:10ec0269,1025022a,00100004 HDA:80862802,80860101,00100000'
     Controls      : 21
     Simple ctrls  : 10
  DistroRelease: Ubuntu 11.04
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  MachineType: Acer Aspire 4810T
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic-pae root=/dev/mapper/vg-root_11.04 ro resume=/dev/vg/swap1104
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
  RelatedPackageVersions:
   linux-restricted-modules-2.6.38-8-generic-pae N/A
   linux-backports-modules-2.6.38-8-generic-pae  N/A
   linux-firmware                                1.52
  Tags:  natty
  Uname: Linux 2.6.38-8-generic-pae i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin audio cdrom dialout fuse lpadmin plugdev sambashare sudo video
  dmi.bios.date: 04/13/2010
  dmi.bios.vendor: INSYDE
  dmi.bios.version: V1.35
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire 4810T
  dmi.board.vendor: Acer
  dmi.board.version: Base Board Version
  dmi.chassis.type: 1
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnINSYDE:bvrV1.35:bd04/13/2010:svnAcer:pnAspire4810T:pvrV1.35:rvnAcer:rnAspire4810T:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
  dmi.product.name: Aspire 4810T
  dmi.product.version: V1.35
  dmi.sys.vendor: Acer

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