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[Alexandr Novel <1383449@xxxxxxxxxxxxxxxxxx>]

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https://bugs.launchpad.net/bugs/1383449

Title:
  Xorg crashed with signal 7 in start_thread()

Status in “xorg-server” package in Ubuntu:
  New

Bug description:
  Tried to use gdb to catch it, however the virtual ttys are blacked out, not frozen, thus could not do anything with it.
  If someone can give me a practical advice on how to back-trace Xorg, I could help to troubleshoot it.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: xserver-xorg-core 2:1.15.1-0ubuntu2.1
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.5
  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
  CrashCounter: 1
  Date: Mon Oct 20 12:28:56 2014
  DistUpgraded: 2014-08-19 14:00:57,964 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExecutablePath: /usr/bin/Xorg
  ExtraDebuggingInterest: Yes
  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 2012-06-22 (850 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: LENOVO 647341U
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdline: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
  ProcEnviron:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=cc4e5011-50ff-4db4-856e-d1ef85ab4327 ro crashkernel=384M-:128M
  Signal: 7
  SourcePackage: xorg-server
  StacktraceTop:
   ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
   ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
   ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
   ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
   start_thread (arg=0x7f5a1f2ac700) at pthread_create.c:312
  Title: Xorg crashed with signal 7 in start_thread()
  UpgradeStatus: Upgraded to trusty on 2014-08-19 (61 days ago)
  UserGroups:
   
  dmi.bios.date: 10/10/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7VET95WW (3.25 )
  dmi.board.name: 647341U
  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:bvr7VET95WW(3.25):bd10/10/2012:svnLENOVO:pn647341U:pvrThinkPadT400:rvnLENOVO:rn647341U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 647341U
  dmi.product.version: ThinkPad T400
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.2
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Mon Oct 20 12:29:04 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               16437 
   vendor                                     LEN
  xserver.version: 2:1.15.1-0ubuntu2.1

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