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[Dimitry <dvporg@xxxxxxxxx>]

May be it will help:
Happened with me both on 14.04 and 14.10
What's most interesting, it seems crash taking place only with nvidia graphics - I've used nvidia card for a year while suffering crash couple times a week, then assemble new computer with Intel graphics and the same OS (14.04, fresh install) and can't recall that bug occur. Recently I've bought Nvidia video card to that PC, updated to 14.10 (fresh install) and last week I have already 2 crashes.

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https://bugs.launchpad.net/bugs/1300821

Title:
  compiz crashed with SIGSEGV in CompWindow::move()

Status in “compiz” package in Ubuntu:
  Confirmed

Bug description:
  I was attempting to move Files from one workspace to another while a
  lot of file IO was occurring (was firing up a VM with vagrant). I
  could not "release" Files and keep it on the second workspace, it kept
  attempting to move with my mouse and eventually compiz crashed.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: compiz-core 1:0.9.11+14.04.20140328-0ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
  Uname: Linux 3.11.0-17-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14-0ubuntu1
  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
  CurrentDesktop: Unity
  Date: Tue Apr  1 17:12:45 2014
  DistUpgraded: 2014-03-04 03:38:53,219 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExecutablePath: /usr/bin/compiz
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] BeaverCreek [Radeon HD 6520G] [1002:9647] (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:1860]
   Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] [1002:6741] (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Radeon HD 7690M [103c:1860]
  InstallationDate: Installed on 2014-03-01 (30 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Hewlett-Packard HP Pavilion dv6 Notebook PC
  ProcCmdline: compiz
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-17-generic root=UUID=a3e6c361-4b43-43b0-b258-f50c42041898 ro quiet splash vt.handoff=7
  SegvAnalysis:
   Segfault happened at: 0x7fb11ed0d8f7 <_ZN10CompWindow4moveEiib+71>:	mov    %cl,0x3f0(%rax)
   PC (0x7fb11ed0d8f7) ok
   source "%cl" ok
   destination "0x3f0(%rax)" (0x7fb11cd47900) in non-writable VMA region: 0x7fb11cccd000-0x7fb11cdd3000 r-xp /lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0
  SegvReason: writing VMA /lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0
  Signal: 11
  SourcePackage: compiz
  StacktraceTop:
   CompWindow::move(int, int, bool) () from /usr/lib/libcompiz_core.so.ABI-20140123
   ExpoScreen::donePaint() () from /usr/lib/compiz/libexpo.so
   CompositeScreen::donePaint() () from /usr/lib/compiz/libcomposite.so
   CompositeScreen::donePaint() () from /usr/lib/compiz/libcomposite.so
   CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so
  Title: compiz crashed with SIGSEGV in CompWindow::move()
  UpgradeStatus: Upgraded to trusty on 2014-03-04 (28 days ago)
  UserGroups: adm autopilot cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 10/24/2012
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.1B
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 1807
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 33.58
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.1B:bd10/24/2012:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr0690210000204710000620100:rvnHewlett-Packard:rn1807:rvr33.58:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion dv6 Notebook PC
  dmi.product.version: 0690210000204710000620100
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.11+14.04.20140328-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu7
  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: Tue Apr  1 16:25:32 2014
  xserver.configfile: default
  xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension.
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.0-1ubuntu7
  xserver.video_driver: radeon

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