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[Bug 1172945] Re: Acer Aspire 5742G brightness Fn keys doesn't change brightness

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Alessandro Facciorusso, 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-rc3

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

If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the following tags:
kernel-unable-to-test-upstream
kernel-unable-to-test-upstream-VERSION-NUMBER

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-v1.30

** Tags added: needs-upstream-testing regression-potential

** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-v3.9

** Summary changed:

- Acer Aspire 5742G brightness Fn keys doesn't change brightness 
+ [Acer Aspire 5742G] brightness Fn keys doesn't change brightness

** Description changed:

  On my Acer Aspire 5742G, the brightness function keys actually shows the brightness notification and changes its bar, but doesn't change the display brightness.
  I tried to add the acpi_backlight=vendor line on GRUB_CMDLINE_LINUX_DEFAULT variable and update grub, but it doesn't do anything.
+ 
+ WORKAROUND: GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_osi=Linux
+ acpi_backlight=vendor“
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-19-generic 3.8.0-19.29 [modified: boot/vmlinuz-3.8.0-19-generic]
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Fri Apr 26 00:26:31 2013
  HibernationDevice: RESUME=UUID=6a7bba52-468e-4dee-8cf5-de71c5d262aa
  InstallationDate: Installed on 2013-04-25 (0 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Acer Aspire 5742G
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=ad2201cc-75ef-47fe-85ff-614ad2fec58e ro quiet splash acpi_backlight=vendor
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/13/2012
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.30
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire 5742G
  dmi.board.vendor: Acer
  dmi.board.version: V1.30
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.30
  dmi.modalias: dmi:bvnAcer:bvrV1.30:bd08/13/2012:svnAcer:pnAspire5742G:pvrV1.30:rvnAcer:rnAspire5742G:rvrV1.30:cvnAcer:ct10:cvrV1.30:
  dmi.product.name: Aspire 5742G
  dmi.product.version: V1.30
  dmi.sys.vendor: Acer

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

-- 
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https://bugs.launchpad.net/bugs/1172945

Title:
  [Acer Aspire 5742G] brightness Fn keys doesn't change brightness

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  On my Acer Aspire 5742G, the brightness function keys actually shows the brightness notification and changes its bar, but doesn't change the display brightness.
  I tried to add the acpi_backlight=vendor line on GRUB_CMDLINE_LINUX_DEFAULT variable and update grub, but it doesn't do anything.

  WORKAROUND: GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_osi=Linux
  acpi_backlight=vendor“

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-19-generic 3.8.0-19.29 [modified: boot/vmlinuz-3.8.0-19-generic]
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Fri Apr 26 00:26:31 2013
  HibernationDevice: RESUME=UUID=6a7bba52-468e-4dee-8cf5-de71c5d262aa
  InstallationDate: Installed on 2013-04-25 (0 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Acer Aspire 5742G
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=ad2201cc-75ef-47fe-85ff-614ad2fec58e ro quiet splash acpi_backlight=vendor
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/13/2012
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.30
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire 5742G
  dmi.board.vendor: Acer
  dmi.board.version: V1.30
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.30
  dmi.modalias: dmi:bvnAcer:bvrV1.30:bd08/13/2012:svnAcer:pnAspire5742G:pvrV1.30:rvnAcer:rnAspire5742G:rvrV1.30:cvnAcer:ct10:cvrV1.30:
  dmi.product.name: Aspire 5742G
  dmi.product.version: V1.30
  dmi.sys.vendor: Acer

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