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[Theodore Vasiloudis <theodoros.vasiloudis@xxxxxxxxx>]

Turns out it was a faulty screen, closing this.

** Changed in: xorg (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1444442

Title:
  External screen turns grey or green after some random time.

Status in xorg package in Ubuntu:
  Invalid

Bug description:
  As in the title the external screen attached to my laptop through
  Displayport suddenly turns grey and I have to unplug/replug it in
  order to get the environment to appear again.

  This bug started appearing after installing the latest updates
  (2015-04-14) that included linux-headers-3.13.0-49-generic:amd64.

  I have in the past installed the Intel Linux Graphics drivers which
  apparently are now causing some problems with 14.04 so the problem
  could also be caused by that.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
  Uname: Linux 3.13.0-49-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.8
  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
  CurrentDesktop: Unity
  Date: Wed Apr 15 14:17:51 2015
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Several times a day
  GpuHangReproducibility: Seems to happen randomly
  GpuHangStarted: Today
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:2214]
  InstallationDate: Installed on 2014-08-19 (238 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: LENOVO 20AL00BYMS
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-49-generic root=UUID=58f7be01-3efd-41f5-adbb-d0a430268da1 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/09/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GIET79WW (2.29 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AL00BYMS
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 PRO
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGIET79WW(2.29):bd01/09/2015:svnLENOVO:pn20AL00BYMS:pvrThinkPadX240:rvnLENOVO:rn20AL00BYMS:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AL00BYMS
  dmi.product.version: ThinkPad X240
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.11.3+14.04.20150122-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu2intel1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu2intel1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.7
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.911-0intel1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Wed Apr 15 10:59:44 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               41106 
   vendor                                     DEL
  xserver.version: 2:1.15.1-0ubuntu2.7

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