Public bug reported:

This time it was while exporting a file from Gimp (it seems any random
mouse click can trigger this at any moment).

The whole system got frozen; only the mouse cursor moved (smoothly),
though its animation (which at that moment was a circular waiting
animatiion) got frozen.

The system wouldn't respond to any click nor keystroke, not even
ctrl+alt+f1.

There was nothing to do but shut down the computer by holding the power
button. All unsaved data lost.


Since 12.04 or so, Ubuntu has become more unreliable and unstable than Windows.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-38.59-generic 3.5.7.17
Uname: Linux 3.5.0-38-generic i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86 Kernel Module  304.88  Wed Mar 27 14:31:12 PDT 
2013
 GCC version:  gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
.tmp.unity.support.test.0:
 
ApportVersion: 2.6.1-0ubuntu12
Architecture: i386
CompizPlugins: 
[core,composite,opengl,decor,vpswitch,mousepoll,compiztoolbox,snap,commands,place,resize,session,regex,grid,wall,move,gnomecompat,imgpng,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Wed Aug  7 02:21:37 2013
DistUpgraded: 2013-01-13 11:55:33,566 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation G84 [GeForce 9500M GS] [10de:0405] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:15d2]
InstallationDate: Installed on 2010-06-23 (1140 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: ASUSTeK Computer Inc. M51Sn
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-38-generic 
root=UUID=173acbf5-26a0-49e3-8d2b-f1c142582cbf ro quiet splash
SourcePackage: xorg
UpgradeStatus: Upgraded to quantal on 2013-01-13 (205 days ago)
dmi.bios.date: 12/24/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 303
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: M51Sn
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr303:bd12/24/2007:svnASUSTeKComputerInc.:pnM51Sn:pvr1.0:rvnASUSTeKComputerInc.:rnM51Sn:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: M51Sn
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
version.compiz: compiz 1:0.9.8.6+bzr3433-0ubuntu1
version.libdrm2: libdrm2 2.4.43-0ubuntu0.2
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu0.4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu0.4
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug compiz-0.9 i386 quantal running-unity ubuntu

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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1209035

Title:
  Whole system frozen, had to hard power off

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