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[Launchpad Bug Tracker <1227188@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1227188

Title:
  brightness doesn't work on Lenovo IdeaPad Yoga 13

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Similar to bug 11588934, I get acpi_video0 & intel_backlight, or
  (ideapad & intel_backlight) depending on the osi_* kernel cmd line
  settings. The one that is preferred / used (acpi_video0 / ideapad) do
  not work. Whereas intel_backlight is the one that does work. I have
  Lenovo IdeaPad Yoga 13.

  I have now specified:
  /etc/X11/xorg.conf.d/backlight.conf
  Section "Device"
    Identifier "Device0"
    Option "Backlight" "intel_backlight"
  EndSection

  I guess a similar blacklist as was applied for HP should be applied in
  upstream kernel for Yoga?

  Regards,

  Dmitrijs.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: xorg 1:7.7+1ubuntu5
  ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
  Uname: Linux 3.11.0-4-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Wed Sep 18 09:54:16 2013
  DistUpgraded: Fresh install
  DistroCodename: saucy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3977]
  InstallationDate: Installed on 2013-08-29 (20 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130829)
  MachineType: LENOVO 2191
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-4-generic.efi.signed root=UUID=5c176060-d588-4044-87b6-50b785b931b1 ro quiet splash acpi_backlight=legacy acpi_osi=Linux vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/21/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 66CN54WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: INVALID
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900003WIN8 STD MLT
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo IdeaPad Yoga 13
  dmi.modalias: dmi:bvnLENOVO:bvr66CN54WW:bd01/21/2013:svnLENOVO:pn2191:pvrLenovoIdeaPadYoga13:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadYoga13:
  dmi.product.name: 2191
  dmi.product.version: Lenovo IdeaPad Yoga 13
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.10+13.10.20130828.2-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.46-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
  xserver.bootTime: Wed Sep 18 09:47:52 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 864 
   vendor                                     LGD
  xserver.version: 2:1.14.2.901-2ubuntu4

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