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[Phill <1531824@xxxxxxxxxxxxxxxxxx>]

** Attachment added: "DMESG taken from the terminal during a freeze."
   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1531824/+attachment/4545514/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1531824

Title:
  Xorg freeze

Status in xorg package in Ubuntu:
  New

Bug description:
  Symptoms:

  * Video is frozen.

  Observations:

  * Mouse moves normally.
  * There is no hard-disc activity.
  * Once  minute or so the video will respond like it's doing so a frame at a time.
  * Pressing CTRL+ALT+F6 and then waiting a minute or so puts you into a terminal.
  * Text terminals work normally without any problems.
  * Pressing ALT+F7 from a text terminal puts you into either black frozen screen or a frozen graphical display.
  * Restarting LightDM doesn't resolve the problem, it shows the login screen and freezes.

  When does it occur:

  * More often than not on or immediately after resume from suspend.
  * Occasionally, but not very often, during normal use.
  * It occurs several times a week, usually after several hours of suspend.

  It started a few months ago.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 3.16.0-57.77~14.04.1-generic 3.16.7-ckt20
  Uname: Linux 3.16.0-57-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.19
  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: Thu Jan  7 11:29:40 2016
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 4.3.34, 3.16.0-56-generic, x86_64: installed
   virtualbox, 4.3.34, 3.16.0-57-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Several times a week
  GpuHangReproducibility: Occurs more often under certain circumstances
  GpuHangStarted: Since a couple weeks or more
  GraphicsCard:
   Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e22] (rev 03) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:8276]
     Subsystem: ASUSTeK Computer Inc. Device [1043:8276]
  InstallationDate: Installed on 2015-07-13 (177 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: System manufacturer V-P5G45
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-57-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/18/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0405
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: V-P5G45
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0405:bd05/18/2009:svnSystemmanufacturer:pnV-P5G45:pvrSystemVersion:rvnASUSTeKComputerINC.:rnV-P5G45:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: V-P5G45
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri N/A
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Thu Jan  7 11:11:57 2016
  xserver.configfile: default
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               41085 
   vendor                                     DEL
  xserver.version: 2:1.16.0-1ubuntu1.2~trusty2

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