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** Attachment added: "Stacktrace.txt"
   https://bugs.launchpad.net/bugs/1286485/+attachment/4002003/+files/Stacktrace.txt

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https://bugs.launchpad.net/bugs/1286485

Title:
  Unity crashed at login. unity_support_test crashed with SIGSEGV in
  __GI___pthread_mutex_lock()

Status in “nux” package in Ubuntu:
  New

Bug description:
  Ubuntu 14.04 daily (2014-02-28) on VirtualBox 4.3.8 (Windows 8.1 Host)

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: nux-tools 4.0.5+14.04.20140226-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-13.33-generic 3.13.5
  Uname: Linux 3.13.0-13-generic i686
  .tmp.unity.support.test.0:
   
  .tmp.unity.support.test.1:
   
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: Unity
  Date: Sat Mar  1 09:55:43 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExecutablePath: /usr/lib/nux/unity_support_test
  GraphicsCard: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter [80ee:beef] (prog-if 00 [VGA controller])
  InstallationDate: Installed on 2014-02-28 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20140228)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: innotek GmbH VirtualBox
  ProcCmdline: /usr/lib/nux/unity_support_test
  ProcEnviron:
   LANGUAGE=de_DE
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-13-generic root=UUID=009f76d7-d4b5-487d-b94a-f6d8e7e23372 ro quiet splash vt.handoff=7
  Renderer: Software
  SegvAnalysis:
   Segfault happened at: 0xb7351036 <__GI___pthread_mutex_lock+22>:	mov    0xc(%esi),%eax
   PC (0xb7351036) ok
   source "0xc(%esi)" (0x00001070) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
   Stack memory exhausted (SP below stack segment)
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: nux
  StacktraceTop:
   __GI___pthread_mutex_lock (mutex=0x1064) at ../nptl/pthread_mutex_lock.c:66
   pthread_mutex_lock (mutex=0x1064) at forward.c:192
   crLockMutex () from /usr/lib/VBoxOGLcrutil.so
   crHashtableLock () from /usr/lib/VBoxOGLcrutil.so
   ?? () from /usr/lib/i386-linux-gnu/dri/vboxvideo_dri.so
  Title: unity_support_test crashed with SIGSEGV in __GI___pthread_mutex_lock()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH
  version.compiz: compiz 1:0.9.11+14.04.20140218-0ubuntu1
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc1-1ubuntu4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc1-1ubuntu4
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Sat Mar  1 09:54:39 2014
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Sleep Button         KEYBOARD, id 7
   input        VirtualBox mouse integration TOUCHSCREEN, id 8
   input        AT Translated Set 2 keyboard KEYBOARD, id 9
   input        ImExPS/2 Generic Explorer Mouse MOUSE, id 10
  xserver.errors:
   AIGLX error: vboxvideo does not export required DRI extension
   AIGLX: reverting to software rendering
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.0-1ubuntu6
  xserver.video_driver: vboxvideo

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