** No longer affects: xmir

** Tags added: xmir

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https://bugs.launchpad.net/bugs/1231857

Title:
  [DPMS] Display backlight turns back on almost immediately after being
  turned off

Status in Mir:
  Fix Released
Status in The Ubuntu Power Consumption Project:
  Fix Committed
Status in mir package in Ubuntu:
  Fix Released
Status in xorg-server package in Ubuntu:
  Triaged

Bug description:
  Display backlight turns back on almost immediately after being turned
  off.

  In theory DPMS support has landed in XMir, but it's not really
  working.

  TEST CASE:
  xset dpms force off
  Expected: Screen turns off and stays off
  Observed: Screen turns off and then immediately either:
    (a) turns back on fully; or
    (b) the backlight turns back on but the screen remains black.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: xserver-xorg-xmir 2:1.14.2.901-2ubuntu6
  ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
  Uname: Linux 3.11.0-8-generic x86_64
  ApportVersion: 2.12.4-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  Date: Fri Sep 27 16:25:33 2013
  DistUpgraded: Fresh install
  DistroCodename: saucy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 2nd Generation Core Processor Family Integrated Graphics 
Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21da]
  InstallationDate: Installed on 2013-06-11 (107 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130611)
  MachineType: LENOVO 4286CTO
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-8-generic 
root=UUID=25c27832-0efa-4fc4-8a14-41af68d008dc ro quiet splash vt.handoff=7
  SourcePackage: xorg-server
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/18/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET69WW (1.39 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4286CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4286CTO
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.10+13.10.20130920-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.46-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu9
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Fri Sep 27 16:45:50 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs: Output                                    DP-0            
DP-1            DP-2          HDMI-0          HDMI-1          HDMI-2           
VGA-0
  xserver.version: 2:1.14.2.901-2ubuntu6
  xserver.video_driver: intel

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