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[nbadal <789346@xxxxxxxxxxxxxxxxxx>]

Mine always darkens, and it sometimes goes to ~%70, but other times it
seems to go all the way down.

Also, I've updated the BIOS and graphics drivers and the problem still
occurs.

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https://bugs.launchpad.net/bugs/789346

Title:
  Screen brighness randomly changes on Lenovo Y560 laptop

Status in “gnome-power-manager” package in Ubuntu:
  Confirmed

Bug description:
  My installation of Ubuntu 11.04 randomly changes screen brightness without input from the user. The time between brightness changes can be from hours to seconds.
  Changing the brightness back manually temporarily fixes this until it changes again.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: xorg 1:7.6+4ubuntu3
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  NonfreeKernelModules: fglrx
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Fri May 27 14:14:12 2011
  DistUpgraded: Fresh install
  DistroCodename: natty
  DistroVariant: ubuntu
  DkmsStatus: fglrx, 8.840, 2.6.38-8-generic, x86_64: installed
  EcryptfsInUse: Yes
  GraphicsCard:
   ATI Technologies Inc Madison [Mobility Radeon HD 5000 Series] [1002:68c0] (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3927]
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  JockeyStatus: xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
  Lsusb:
   Bus 002 Device 003: ID 064e:f207 Suyin Corp. 
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO IdeaPad Y560
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=eae539fd-b776-4fb8-8c49-f6d0d205c3f3 ro quiet splash vt.handoff=7
  Renderer: Unknown
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/23/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 30CN62WW
  dmi.board.name: KL3
  dmi.board.vendor: Lenovo
  dmi.board.version: Rev 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Lenovo
  dmi.chassis.version: Rev 1.0
  dmi.modalias: dmi:bvnLENOVO:bvr30CN62WW:bd07/23/2010:svnLENOVO:pnIdeaPadY560:pvrRev1.0:rvnLenovo:rnKL3:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0:
  dmi.product.name: IdeaPad Y560
  dmi.product.version: Rev 1.0
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
  version.fglrx-installer: fglrx-installer N/A
  version.ia32-libs: ia32-libs 20090808ubuntu13
  version.libdrm2: libdrm2 2.4.23-1ubuntu6
  version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
  version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

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