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[arty <1032276@xxxxxxxxxxxxxxxxxx>]

And another update: I have occasionally fixed that by reenabling desktop
icons.

I have previously used Ubuntu Tweak to disable icons on desktop.
Apparently this removes some kind of root nautilus window (which also
draws the background BTW). It looks like Compiz expects this window to
exist, and if it does not exist and all other windows are minimized then
Compiz goes crazy.

To fix the missing desktop background I have reset this option to the
original state, now Nautilus draws background and icons, and I can
safely minimize all windows.

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https://bugs.launchpad.net/bugs/1032276

Title:
  [nvidia] Graphics freeze when I close or minimize a window

Status in Compiz:
  Confirmed
Status in compiz package in Ubuntu:
  Confirmed

Bug description:
  Often when I minimize or close the last open window so the desktop
  becomes visible the graphics freeze for several seconds up to 2
  minutes.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: unity 5.12-0ubuntu1.1
  ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
  Uname: Linux 3.2.0-27-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Ist ein Verzeichnis: '/proc/driver/nvidia/gpus/0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  295.40  Thu Apr  5 21:37:00 PDT 2012
   GCC version:  gcc-Version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.0.1-0ubuntu11
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  CompositorRunning: compiz
  Date: Thu Aug  2 18:09:40 2012
  DistUpgraded: 2011-10-09 20:46:50,221 DEBUG enabling apt cron job
  DistroCodename: precise
  DistroVariant: ubuntu
  DkmsStatus:
   nvidia-current, 295.40, 3.2.0-26-generic, x86_64: installed
   nvidia-current, 295.40, 3.2.0-27-generic, x86_64: installed
   virtualbox, 4.1.12, 3.2.0-26-generic, x86_64: installed
   virtualbox, 4.1.12, 3.2.0-27-generic, x86_64: installed
  GraphicsCard: NVIDIA Corporation G92 [GeForce 9800 GT] [10de:0614] (rev a2) (prog-if 00 [VGA controller])
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  JockeyStatus:
   xorg:nvidia_current - Beschleunigter Grafiktreiber von NVIDIA (Proprietär, Aktiviert, In Benutzung)
   xorg:nvidia_current_updates - NVIDIAs beschleunigte Grafiktreiber (Nachträgliche Aktualisierungen) (Proprietär, Deaktiviert, Nicht benutzt)
  MachineType: Gigabyte Technology Co., Ltd. M56S-S3
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic root=UUID=2d70f1cc-b8b7-447f-b0ae-794e6acd901a ro quiet splash vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: Upgraded to precise on 2011-10-09 (297 days ago)
  dmi.bios.date: 08/20/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F6h
  dmi.board.name: GA-M56S-S3
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6h:bd08/20/2010:svnGigabyteTechnologyCo.,Ltd.:pnM56S-S3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-M56S-S3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: M56S-S3
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.
  version.compiz: compiz 1:0.9.7.8-0ubuntu1.2
  version.ia32-libs: ia32-libs 20090808ubuntu36
  version.libdrm2: libdrm2 2.4.32-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 8.0.2-0ubuntu3.1
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

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