[Bug 913793] Re: keyboard backlight adjust wrongly

[Sebastien Bacher]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. The issue you are reporting is an upstream one and it
would be nice if somebody having it could send the bug to the developers
of the software by following the instructions at
https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please
tell us the number of the upstream bug (or the link), so we can add a
bugwatch that will inform us about its status. Thanks in advance.

** Also affects: gnome-settings-daemon
   Importance: Undecided
       Status: New

** Changed in: gnome-settings-daemon (Ubuntu)
     Assignee: Ubuntu Desktop (ubuntu-desktop) => (unassigned)

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https://bugs.launchpad.net/bugs/913793

Title:
  keyboard backlight adjust wrongly

Status in Gnome Settings Daemon:
  New
Status in “gnome-settings-daemon” package in Ubuntu:
  Triaged

Bug description:
  When pressing F5/F6 to decrease keyboard backlight on Macbook Air 4,1,
  the kbd backlight suddenly become to the MAX (full) value when it's
  going to be MIN (zero).

  Expected behavior:
  Keep pressing F5, the kbd backlight should decrease until zero and the backlight applet should display an empty bar.

  Current behavior:
  Keep pressing F5, the kdb backlight decreases until zero (dark without any light), but the applet jump to a full bar - So pressing F5/F6 again would adjust the kbd backlight from maximum state (instead of minimum state).

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-8-generic 3.2.0-8.14
  ProcVersionSignature: Ubuntu 3.2.0-8.14-generic 3.2.0
  Uname: Linux 3.2.0-8-generic x86_64
  NonfreeKernelModules: wl
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.90-0ubuntu1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: Cirrus Analog [Cirrus Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lli5       1417 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0x90600000 irq 47'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:10134206,106b6200,00100302 HDA:80862805,80860101,00100000'
     Controls      : 25
     Simple ctrls  : 9
  Date: Mon Jan  9 07:51:30 2012
  HibernationDevice: RESUME=UUID=cc35910e-72f8-4156-85f0-acfc48012f31
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64+mac (20120108)
  MachineType: Apple Inc. MacBookAir4,1
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-8-generic root=UUID=02e7076b-bab1-4657-ae2c-d6c733869f1c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-8-generic N/A
   linux-backports-modules-3.2.0-8-generic  N/A
   linux-firmware                           1.67
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/14/2011
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA41.88Z.0077.B0E.1110141154
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-C08A6BB70A942AC2
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookAir4,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-C08A6BB70A942AC2
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B0E.1110141154:bd10/14/2011:svnAppleInc.:pnMacBookAir4,1:pvr1.0:rvnAppleInc.:rnMac-C08A6BB70A942AC2:rvrMacBookAir4,1:cvnAppleInc.:ct10:cvrMac-C08A6BB70A942AC2:
  dmi.product.name: MacBookAir4,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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