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[Jani Uusitalo <jani@xxxxxxxxxxx>]

Hi Christopher, the apport-collected data above was gathered from my
main desktop, which only has Intel graphics. (I mentioned the other
system with Radeon just because it *didn't* suffer from this problem
despite having the same software. I no longer have access to that system
so unfortunately I can't provide the same logs from it for comparision.)

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https://bugs.launchpad.net/bugs/1345573

Title:
  Horizontal lines flashing on screen briefly

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Since upgrading HWE from -lts-saucy to -lts-trusty, I have had
  recurring graphical glitches on screen, with short black horizontal
  lines appearing briefly on screen (on top of normal contents),
  particularly when switching between applications. The lines appear
  only for a few 100 ms before going away (just enough to register in
  your eye that there's something there), so I've been trying to make a
  screen recording to capture it, but of course the phenomenon goes away
  when I do (perhaps RecordMyDesktop does something with the screen that
  makes it less likely to appear).

  I have another 12.04 system with desktop Radeon graphics, and there
  -lts-trusty has not produced this issue so far (the one with the issue
  and the one I'm attaching the logs here from has Intel).

  I don't recall seeing this with -lts-saucy or other previous Xorg
  packages. It was so obvious right after upgrading that either it never
  occurred before or was so rare or quick to flash away that it didn't
  register.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: xserver-xorg-lts-trusty 1:7.7+1ubuntu8~precise1
  ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  CheckboxSubmission: 09ae689090491ca53449589269e4bfd8
  CheckboxSystem: edda5d4f616ca792bf437989cb597002
  Date: Sun Jul 20 15:21:12 2014
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  MarkForUpload: True
  SourcePackage: xorg-lts-trusty
  UpgradeStatus: Upgraded to precise on 2014-07-11 (9 days ago)
  --- 
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.0.1-0ubuntu17.9
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,gnomecompat,snap,imgpng,unitymtgrabhandles,move,place,grid,resize,mousepoll,vpswitch,regex,winrules,wall,session,animation,workarounds,expo,ezoom,fade,scale,unityshell]
  CompositorRunning: compiz
  DistUpgraded: 2014-07-11 11:04:24,254 DEBUG running doUpdate() (showErrors=True)
  DistroCodename: precise
  DistroRelease: Ubuntu 12.04
  DistroVariant: ubuntu
  DkmsStatus: vboxhost, 4.3.28, 3.13.0-53-generic, x86_64: installed
  ExtraDebuggingInterest: Yes,
  GraphicsCard:
   Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  MachineType: System manufacturer System Product Name
  MarkForUpload: True
  Package: xorg 1:7.6+12ubuntu2
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-53-generic root=UUID=28b993a2-7b5f-45fb-9062-173b0759a0ee ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-53.89~precise1-generic 3.13.11-ckt19
  Tags:  precise running-unity ubuntu compiz-0.9
  Uname: Linux 3.13.0-53-generic x86_64
  UpgradeStatus: Upgraded to precise on 2014-07-11 (318 days ago)
  UserGroups: adm bluetooth cdrom dip lpadmin plugdev sambashare ssh sudo vboxusers
  dmi.bios.date: 10/17/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1505
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8H77-M PRO
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1505:bd10/17/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-MPRO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  version.compiz: compiz 1:0.9.7.12-0ubuntu4
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1~precise2
  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

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