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[Mattst88 <1413710@xxxxxxxxxxxxxxxxxx>]

I suspect this may be another duplicate of the bug 80568, fixed (worked-
around) by this commit:

commit c4fd0c9052dd391d6f2e9bb8e6da209dfc7ef35b
Author: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
Date:   Sat Jan 17 23:21:15 2015 -0800

    i965: Work around mysterious Gen4 GPU hangs with minimal state changes.
    
    Gen4 hardware appears to GPU hang frequently when using Chromium, and
    also when running 'glmark2 -b ideas'.  Most of the error states contain
    3DPRIMITIVE commands in quick succession, with very few state packets
    between them - usually VERTEX_BUFFERS/ELEMENTS and CONSTANT_BUFFER.
    
    I trimmed an apitrace of the glmark2 hang down to two draw calls with a
    glUniformMatrix4fv call between the two.  Either draw by itself works
    fine, but together, they hang the GPU.  Removing the glUniform call
    makes the hangs disappear.  In the hardware state, this translates to
    removing the CONSTANT_BUFFER packet between the two 3DPRIMITIVE packets.
    
    Flushing before emitting CONSTANT_BUFFER packets also appears to make
    the hangs disappear.  I observed a slowdown in glxgears by doing it all
    the time, so I've chosen to only do it when BRW_NEW_BATCH and
    BRW_NEW_PSP are unset (i.e. we haven't done a CS_URB_STATE change or
    already flushed the whole pipeline).
    
    I'd much rather understand the problem, but at this point, I don't see
    how we'd ever be able to track it down further.  We have no real tools,
    and the hardware people moved on years ago.  I've analyzed 20+ error
    states and read every scrap of documentation I could find.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80568
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85367
    Signed-off-by: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
    Acked-by: Matt Turner <mattst88@xxxxxxxxx>
    Cc: "10.4 10.3" <mesa-stable@xxxxxxxxxxxxxxxxxxxxx>

It's in git, and backports are in Mesa 10.4.x for x >= 3. Please try
upgrading to >=10.4.3. If it's resolved by such an upgrade, please mark
as a duplicate of bug 80568.

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https://bugs.launchpad.net/bugs/1413710

Title:
  Xorg crash - Fullscreen causing crash

Status in X.Org X server:
  Confirmed
Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  I was listening to this YouTube video:
  http://www.infinitelooper.com/?v=-tJYN-eG1zk&p=n

  When I decided to make it full screen, but it didn't want to go, so I
  very quickly double-clicked on it twice, and then the entire screen
  went black. And no matter what I did, it go away. Although I could
  still hear the music from the video. As I couldn't do anything really
  about it I had to hold down my power button and force it to shutdown.
  And when it started up the screen was fine. It is a laptop so I don't
  think that the monitor just turned off or something.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xorg 1:7.7+7ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2
  Uname: Linux 3.16.0-29-generic x86_64
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.7-0ubuntu8.1
  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 22 19:26:26 2015
  DistUpgraded: 2014-12-13 16:39:34,851 DEBUG enabling apt cron job
  DistroCodename: utopic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:5002]
  InstallationDate: Installed on 2014-12-06 (47 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: LENOVO 62742SG
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-29-generic root=UUID=3883b8c8-34cb-4ec2-8834-fe85bbd10f52 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg crash
  UpgradeStatus: Upgraded to utopic on 2014-12-13 (40 days ago)
  dmi.bios.date: 11/15/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: H5ET69WW (1.12 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 62742SG
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK IPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrH5ET69WW(1.12):bd11/15/2012:svnLENOVO:pn62742SG:pvrLenovoB590:rvnLENOVO:rn62742SG:rvrWin8ProDPKIPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 62742SG
  dmi.product.version: Lenovo B590
  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 2:1.16.0-1ubuntu1.2
  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~exp1ubuntu4.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Thu Jan 22 19:19:28 2015
  xserver.configfile: default
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 827
   vendor                                     LGD
  xserver.version: 2:1.16.0-1ubuntu1.2

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