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[Sebastien Bacher <seb128@xxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/872652

Title:
  screensaver backlight stuck off, system looks hung

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

Bug description:
  After the screensaver fades the screen to black and turns off the
  backlight, tapping a keyboard key does NOT turn the backlight back on
  again.  The backlight is "stuck off" making the system appear to be
  hung.

  This a regression in Ubuntu 11.10.

  ----- (original problem description) -----

  [The original problem description is below, however it has been
  determined that the problem occurs with the the stock 11.10 release
  kernel and does not actually relate to acpi_backlight=vendor.]

  I have been using Kamal Mostafa's kernels for my Dell Studio 15 for a
  few releases. Now, in oneiric, the brightness can not be changed
  unless I add acpi_backlight=vendor to the kernel command line. The
  brightness adjustment works fine when I make this change.

  However, when I add this command line option, it introduces another
  issue where when the display goes to sleep, it does not resume.

  Somtimes I get the screen back by switching to a console tty and then
  back to the X tty. But, the only reliable way I can get a screen to
  come back on is to close the laptop lid (so the system suspends) and
  then open it. The display will turn on for resume.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jrubin     3145 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf0a00000 irq 45'
     Mixer name	: 'Intel IbexPeak HDMI'
     Components	: 'HDA:111d7675,10280413,00100103 HDA:80862804,80860101,00100000'
     Controls      : 20
     Simple ctrls  : 11
  Date: Tue Oct 11 22:09:44 2011
  HibernationDevice: RESUME=UUID=ffe5b171-a88d-44b8-9f4e-bca222ce60bd
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
  MachineType: Dell Inc. Studio 1558
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-12-generic N/A
   linux-backports-modules-3.0.0-12-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to oneiric on 2011-10-03 (8 days ago)
  dmi.bios.date: 03/30/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A12
  dmi.board.name: 0G939P
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A12
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A12
  dmi.modalias: dmi:bvnDellInc.:bvrA12:bd03/30/2011:svnDellInc.:pnStudio1558:pvrA12:rvnDellInc.:rn0G939P:rvrA12:cvnDellInc.:ct8:cvrA12:
  dmi.product.name: Studio 1558
  dmi.product.version: A12
  dmi.sys.vendor: Dell Inc.

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