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[John Drinkwater <john@xxxxxxxxxxxxx>]

This bug is still on 15.10, trying `sudo ubuntu-bug
/var/crash/_usr_bin_metacity.1000.crash` opens the dialogue, but it
closes itself before submission. May I upload the crash file?

syslog has:
Feb  2 19:08:34 joran gnome-session[2014]: [xcb] Unknown sequence number while processing queue
Feb  2 19:08:34 joran gnome-session[2014]: [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
Feb  2 19:08:34 joran gnome-session[2014]: [xcb] Aborting, sorry about that.
Feb  2 19:08:34 joran gnome-session[2014]: metacity: ../../src/xcb_io.c:274: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
Feb  2 19:08:37 joran gnome-session[2014]: gnome-session[2014]: WARNING: Application 'metacity.desktop' killed by signal 6
Feb  2 19:08:37 joran gnome-session[2014]: WARNING: Application 'metacity.desktop' killed by signal 6
Feb  2 19:08:37 joran gnome-session[2014]: Unrecoverable failure in required component metacity.desktop

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Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1535906

Title:
  X crashes with gnome-session: Fatal IO error 11

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  This has been happening on and off since the Autumn, but only a handful of times so I haven’t been able to discover an underlying cause. It appears to trigger when I am using an application using GL, especially games though it has happened with just VLC, firefox and a file terminal sessions open.
  Moved onto the latest nvidia driver today to verify it was still happening there, with NVIDIA 361.18.

  One thing that might coincide with the problems is Firefox moving to
  GTK 3…

  I grabbed what appears to be the root cause in syslog, https://gist.github.com/johndrinkwater/9188eb52dd6dae3cdba3
  as everything preceeding these lines are debug spew from the game I had been using, Awesomenauts.

  Jan 19 20:15:25 joran gnome-session[1858]: LeWindow manager warning: Log level 16: metacity: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
  Jan 19 20:15:25 joran gnome-session[1858]: gnome-session[1858]: WARNING: Child process 1940 was already dead.
  Jan 19 20:15:25 joran gnome-session[1858]: WARNING: Child process 1940 was already dead.

  First the window borders vanish, then applications start to close and
  it kicks me back to the desktop.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-43.49-generic 3.19.8-ckt10
  Uname: Linux 3.19.0-43-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  361.18  Sat Jan  9 21:27:18 PST 2016
   GCC version:  gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
  ApportVersion: 2.17.2-0ubuntu1.8
  Architecture: amd64
  CurrentDesktop: GNOME-Flashback:Unity
  Date: Tue Jan 19 20:56:31 2016
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.19.0-33-generic, x86_64: installed
   bbswitch, 0.7, 3.19.0-39-generic, x86_64: installed
   bbswitch, 0.7, 3.19.0-42-generic, x86_64: installed
   bbswitch, 0.7, 3.19.0-43-generic, x86_64: installed
   nvidia-361, 361.18, 3.19.0-43-generic, x86_64: installed
  GraphicsCard:
   NVIDIA Corporation GK104 [GeForce GTX 660 Ti] [10de:1183] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:841e]
  InstallationDate: Installed on 2015-06-05 (228 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-43-generic root=UUID=9b0f5dfa-6a96-4dac-b300-639131c68048 ro quiet splash
  SourcePackage: xorg
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/02/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 080014
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: A76ML-K 30
  dmi.board.vendor: FOXCONN
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080014:bd04/02/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnFOXCONN:rnA76ML-K30:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  version.compiz: compiz 1:0.9.12.1+15.04.20150922-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Tue Jan 19 20:15:26 2016
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        UVC Camera (046d:0992) KEYBOARD, id 8
   input        Dell Dell Smart Card Reader Keyboard KEYBOARD, id 9
   input        Logitech Gaming Mouse G400 MOUSE, id 10
  xserver.errors:
   open /dev/fb0: No such file or directory
   Error loading keymap /var/lib/xkb/server-65487C2D0208C75C86C3B9612D8E48759EB03D9D.xkm
   Error loading keymap /var/lib/xkb/server-65487C2D0208C75C86C3B9612D8E48759EB03D9D.xkm
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.17.1-0ubuntu3.1

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