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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

MegaBrutal, did this also happen in Trusty, or was this issue new in
Utopic?

** Tags added: vivid

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https://bugs.launchpad.net/bugs/1444268

Title:
  [Lenovo ThinkPad T400] Screen corruption

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  I often perceive massive screen corruption, most prominently in
  Firefox / GMail, but it may happen with any application, including
  terminals. Sometimes oversized letters appear. I run video stress
  tests, but they run without errors. I suspect the problem presents
  when many text needs to be rendered on-screen, as odd as it sounds.

  I will attach screenshots.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xorg 1:7.7+7ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-34.45-generic 3.16.7-ckt8
  Uname: Linux 3.16.0-34-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.7-0ubuntu8.2
  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 07:23:31 2015
  DistUpgraded: 2014-11-11 12:36:03,224 DEBUG enabling apt cron job
  DistroCodename: utopic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:20e4]
     Subsystem: Lenovo Device [17aa:20e4]
  InstallationDate: Installed on 2014-06-10 (308 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 6474B84
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-34-generic root=/dev/mapper/thinkvg-rootlv ro rootflags=subvol=@
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to utopic on 2014-11-11 (154 days ago)
  dmi.bios.date: 10/17/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7UET94WW (3.24 )
  dmi.board.name: 6474B84
  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:bvr7UET94WW(3.24):bd10/17/2012:svnLENOVO:pn6474B84:pvrThinkPadT400:rvnLENOVO:rn6474B84:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 6474B84
  dmi.product.version: ThinkPad T400
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.3
  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 2:2.99.914-1~exp1ubuntu4.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Sat Apr 11 00:20:40 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               16435 
   vendor                                     LEN
  xserver.version: 2:1.16.0-1ubuntu1.3

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