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[aldebx <aldebx@xxxxxxxx>]

@penalvch, thank you for assisting.

I've flagged a few other bugs as duplicates of this one to assist
developers in tracking this issue given that several other users are
experiencing xorg crashes on Intel graphic cards while they open new
windows or menus in various applications using unity+compiz in Ubuntu
15.10

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https://bugs.launchpad.net/bugs/1509846

Title:
  lightdm crashes on window open in Ubuntu 15.10 intel

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Symptom: xorg crashes on windows creation

  How to reproduce: No 100% reproducibility, however intensively using
  2D/3D acceleration triggers the bug (e.g. by opening several new
  windows and/or menus in a Unity desktop environment)

  Affected hardware: Intel HD Graphics 4400/5000 etc
  Affected software:
  - kernel 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64
  - Ubuntu 15.10 with Unity (because of compiz 2D/3D acceleration)
  - any other software using direct rendering (e.g. VLC)

  Workaround:
  - Disable window animations in Compiz reduces the frequency of the crashes.
  Use compizconfig-settings-manager for this tweak (sudo apt-get install compizconfig-settings-manager)

  
  [original description below]

  I get crashes, when I open a new window in an already started
  application. It happens irregularely, but I can force the crash if I
  open several new message windows in thunderbird. But it also happens
  in other applilcations, for example a new terminal window.

  This is the output during the crash in /var/log/Xorg.0.log
  [   253.500] (EE)
  [   253.500] (EE) Backtrace:
  [   253.500] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x55f09075b62e]
  [   253.500] (EE) 1: /usr/bin/X (0x55f0905a7000+0x1b8999) [0x55f09075f999]
  [   253.500] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f44130a8000+0x352f0) [0x7f44130dd2f0]
  [   253.500] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x24f18) [0x7f440f4a3f18]
  [   253.500] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x26157) [0x7f440f4a5157]
  [   253.500] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x2b4b1) [0x7f440f4aa4b1]
  [   253.500] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x804e4) [0x7f440f4ff4e4]
  [   253.501] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x80e2c) [0x7f440f4ffe2c]
  [   253.501] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x82e1a) [0x7f440f501e1a]
  [   253.501] (EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x4197c) [0x7f440f4c097c]
  [   253.501] (EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x59906) [0x7f440f4d8906]
  [   253.501] (EE) 11: /usr/bin/X (_CallCallbacks+0x34) [0x55f090604654]
  [   253.501] (EE) 12: /usr/bin/X (WriteToClient+0x244) [0x55f09075f274]
  [   253.501] (EE) 13: /usr/bin/X (WriteEventsToClient+0x1e2) [0x55f09060a502]
  [   253.501] (EE) 14: /usr/bin/X (0x55f0905a7000+0xf495a) [0x55f09069b95a]
  [   253.501] (EE) 15: /usr/bin/X (0x55f0905a7000+0xf5ef5) [0x55f09069cef5]
  [   253.501] (EE) 16: /usr/bin/X (0x55f0905a7000+0x5818f) [0x55f0905ff18f]
  [   253.501] (EE) 17: /usr/bin/X (0x55f0905a7000+0x5c34b) [0x55f09060334b]
  [   253.501] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f44130c8a40]
  [   253.501] (EE) 19: /usr/bin/X (_start+0x29) [0x55f0905ed6c9]
  [   253.501] (EE)
  [   253.501] (EE) Segmentation fault at address 0x0
  [   253.501] (EE)
  Fatal server error:
  [   253.501] (EE) Caught signal 11 (Segmentation fault). Server aborting
  [   253.501] (EE)
  [   253.501] (EE)
  Please consult the The X.Org Foundation support
           at http://wiki.x.org
   for help.
  [   253.501] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
  [   253.502] (EE)
  [   253.502] (II) AIGLX: Suspending AIGLX clients for VT switch
  [   253.588] (EE) Server terminated with error (1). Closing log file.
  ---
  .tmp.unity.support.test.0:

  ApportVersion: 2.19.1-0ubuntu3
  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
  DistUpgraded: Fresh install
  DistroCodename: wily
  DistroRelease: Ubuntu 15.10
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 5.0.4, 4.2.0-11-generic, x86_64: installed
   virtualbox, 5.0.4, 4.2.0-16-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3978]
  InstallationDate: Installed on 2015-10-20 (6 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
  MachineType: LENOVO 20266
  Package: xorg 1:7.7+7ubuntu4
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=a2970568-5fac-4c99-bbdf-be6778ae16d2 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Tags:  wily ubuntu compiz-0.9
  UdevLog: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/var/log/udev'
  Uname: Linux 4.2.0-16-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  _MarkForUpload: True
  dmi.bios.date: 09/17/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 76CN27WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Yoga2
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058STD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Yoga 2 Pro
  dmi.modalias: dmi:bvnLENOVO:bvr76CN27WW:bd09/17/2013:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoYoga2Pro:
  dmi.product.name: 20266
  dmi.product.version: Lenovo Yoga 2 Pro
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.64-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
  xserver.bootTime: Tue Oct 27 02:25:28 2015
  xserver.configfile: default
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               16970
   vendor                                     SDC
  xserver.version: 2:1.17.2-1ubuntu9

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