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[Andrea Azzarone <azzaronea@xxxxxxxxx>]

Maybe this is related to bug #1485727. In both cases thare are graphics
corruptions when changing the screen size. Alan can you try the patch?

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https://bugs.launchpad.net/bugs/1421575

Title:
  Desktop corruption when changing monitor config

Status in xf86-video-intel:
  Confirmed
Status in xserver-xorg-video-intel package in Ubuntu:
  Triaged

Bug description:
  Thinkpad X220 running vivid up to date.

  Usually sits in docking station with external monitor.

  Today I ran the laptop outside the docking station, and plugged it
  into the dock while running (which worked fine forever on utopic) but
  today it now freaks out.

  I deleted ~/.config/monitors.xml to reset my display config

  I restarted and logged in with both monitors active.

  As soon as I change the display config doing the display corrupts,
  flickers and becomes unusable.

  Here's a photo:- http://imgur.com/80LcmgV

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2
  Uname: Linux 3.19.0-031900rc7-generic x86_64
  ApportVersion: 2.16.1-0ubuntu2
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  Date: Fri Feb 13 08:58:00 2015
  DistUpgraded: 2015-02-05 11:21:00,051 DEBUG enabling apt cron job
  DistroCodename: vivid
  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 2014-06-16 (241 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 4287CTO
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-031900rc7-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: Upgraded to vivid on 2015-02-05 (7 days ago)
  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: 4287CTO
  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:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4287CTO
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.0+15.04.20150202-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.58-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.4.2-2ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.4.2-2ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.2.901-1ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Fri Feb 13 08:53:15 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 728 
   vendor                                     LGD
  xserver.version: 2:1.16.2.901-1ubuntu3

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