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[gronki <gronki@xxxxxxxxx>]

UPDATE: This error is reproducible. It occurs everytime I try to add
more than 2 layers in JHelioviewer java application (in the attachment).

** Attachment added: "JHelioviewer"
   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1465822/+attachment/4415820/+files/JHelioviewer.jar

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https://bugs.launchpad.net/bugs/1465822

Title:
  X session crashed

Status in xorg package in Ubuntu:
  New

Bug description:
  While normal use, Unity disappeared, black screen with white blinking
  cursor appeared, then I was redirected to login screen. No changes
  were made to system recently.

  Xorg.log.old indicated the following error:

  [ 11178.146] (EE) 
  [ 11178.146] (EE) Backtrace:
  [ 11178.147] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7f40ec9fded8]
  [ 11178.148] (EE) 1: /usr/bin/X (0x7f40ec859000+0x1a8f19) [0x7f40eca01f19]
  [ 11178.148] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f40ea9d9000+0x36d40) [0x7f40eaa0fd40]
  [ 11178.148] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f40e67df000+0x46431) [0x7f40e6825431]
  [ 11178.148] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f40e67df000+0x4dc90) [0x7f40e682cc90]
  [ 11178.148] (EE) 5: /usr/bin/X (0x7f40ec859000+0x130f5d) [0x7f40ec989f5d]
  [ 11178.148] (EE) 6: /usr/bin/X (0x7f40ec859000+0x4ffe2) [0x7f40ec8a8fe2]
  [ 11178.148] (EE) 7: /usr/bin/X (0x7f40ec859000+0x5369e) [0x7f40ec8ac69e]
  [ 11178.148] (EE) 8: /usr/bin/X (0x7f40ec859000+0x574ea) [0x7f40ec8b04ea]
  [ 11178.148] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f40ea9faec5]
  [ 11178.148] (EE) 10: /usr/bin/X (0x7f40ec859000+0x42a5e) [0x7f40ec89ba5e]
  [ 11178.148] (EE) 
  [ 11178.148] (EE) Segmentation fault at address 0xb0b0008
  [ 11178.148] (EE) 
  Fatal server error:
  [ 11178.148] (EE) Caught signal 11 (Segmentation fault). Server aborting
  [ 11178.148] (EE) 
  [ 11178.148] (EE) 
  Please consult the The X.Org Foundation support 
  	 at http://wiki.x.org
   for help. 
  [ 11178.148] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
  [ 11178.148] (EE) 
  [ 11178.148] (II) AIGLX: Suspending AIGLX clients for VT switch
  [ 11179.500] (EE) Server terminated with error (1). Closing log file.

  (also included as an attachment)

  kern.log:
  Jun 16 21:10:13 dell9 kernel: [11186.675544] show_signal_msg: 153 callbacks suppressed
  Jun 16 21:10:13 dell9 kernel: [11186.675550] PulseaudioSound[3300]: segfault at fffffe5da741ebf7 ip 0000000001c47ce0 sp 00007f61f2014538 error 5 in spotify[400000+2520000]

  (I think Spotify crash was an effect rather than cause of X crash)

  Description:	Ubuntu 14.04.2 LTS
  Release:	14.04
  xorg:
    Zainstalowana: 1:7.7+1ubuntu8.1
    Kandydująca:   1:7.7+1ubuntu8.1
    Tabela wersji:
   *** 1:7.7+1ubuntu8.1 0
          500 http://pl.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:7.7+1ubuntu8 0
          500 http://pl.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  I am a beginning Linux user. If I can provide more information, I will
  be happy to help.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 3.19.0-21.21~14.04.1-generic 3.19.8
  Uname: Linux 3.19.0-21-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.11
  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: Tue Jun 16 21:15:05 2015
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.19.0-20-generic, x86_64: installed
   bbswitch, 0.7, 3.19.0-21-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:05fa]
     Subsystem: Dell Device [1028:05fa]
  InstallationDate: Installed on 2015-06-08 (8 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: Dell Inc. Inspiron 7537
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-21-generic.efi.signed root=UUID=76c8d406-894b-4013-90c6-b4313dc34b14 ro noprompt persistent quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 038M0M
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA10:bd07/18/2014:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn038M0M:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Inspiron 7537
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1
  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
  xserver.bootTime: Tue Jun 16 21:10:13 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                4589 
   vendor                                     AUO
  xserver.version: 2:1.16.0-1ubuntu1.2~trusty2

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