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[Rainer Rohde <1213259@xxxxxxxxxxxxxxxxxx>]

@Christopher --

I already tried that, with my current kernel parameters looking like
this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=/swapfile.swap"

The only thing that changes is that I am now getting an indicator for
the screen brightness, however, the actual screen brightness does not
change with it. In fact, when looking at System Settings > Brightness &
Lock, the Brightness slider is there, but it does not work whatsoever.

PS: Aforementioned keyboard backlight does seem to work with kernel
release 3.11.0-2-generic, which is an improvement.

-- 
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https://bugs.launchpad.net/bugs/1213259

Title:
  Regression - Several ACPI calls no longer work on ASUS G75VW

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Folks,

  I am currently on kernel version 3.11.0-2-generic, and the following
  (what I assume are) ACPI calls no longer work via Fn keys:

  Fn+F2 = Toggle wifi on/off (works manually from the Network Indicator)
  Fn+F5/F6 = Adjust screen brightness (doesn't work at all, not even from the System Settings)
  Fn+F9 = Toggle mousepad on/off (works manually from the System Settings)

  Up until  3.11.0-1-generic, my Fn+F3/F4 = Adjust keyboard backlight
  didn't work, either. This might be fixed in  3.11.0-2-generic, but I
  need to verify this.

  My /etc/default/grub entry for "GRUB_CMDLINE_LINUX_DEFAULT reads
  "quiet splash acpi_osi=Linux acpi_backlight=vendor
  resume=/swapfile.swap" -- not sure if that makes a difference towards
  the ACPI calls...

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-2-generic 3.11.0-2.5
  ProcVersionSignature: Ubuntu 3.11.0-2.5-generic 3.11.0-rc5
  Uname: Linux 3.11.0-2-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  rrohde     2215 F.... pulseaudio
   /dev/snd/controlC0:  rrohde     2215 F.... pulseaudio
  Date: Fri Aug 16 16:47:52 2013
  MachineType: ASUSTeK COMPUTER INC. G75VW
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-2-generic root=UUID=4dac4492-a4d7-4a6d-97bf-ed5c1ee0b1a0 ro elevator=noop quiet splash acpi_osi=Linux acpi_backlight=vendor resume=/swapfile.swap vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-2-generic N/A
   linux-backports-modules-3.11.0-2-generic  N/A
   linux-firmware                            1.113
  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/07/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: G75VW.223
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: G75VW
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG75VW.223:bd01/07/2013:svnASUSTeKCOMPUTERINC.:pnG75VW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG75VW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: G75VW
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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