Random hang/freeze

[stoft]

Random freezes occur up to 3 times per day (8-10 hours). Mouse does not move. Ctrl-Alt-F1 does not switch to terminal 1. SysRq + REISUB does not work, most likely since it's a laptop and it doesn't seem to catch the "Fn" key correctly. A hard reboot is the only solution. The problem appears in Unity, Gnome Classic, XFCE and KDE, but more seldom in KDE (some days not at all). The problem only occurs at two client sites (wifi), never at home (wifi) or the home office (ethernet) which leads me to believe this may actually be network related and not Xorg related. I also get the feeling that it occurs more frequently when running the Opera web browser, but can't be sure. The problem first appeared sometime during the 12.04 release.

Open applications are usually:

Virtualbox (2 or 3 instances, winXP and Win7 guests)
Firefox
Skype
Pidgin
Tomboy
Evolution or Thunderbird
Gnome-do
Weather indicator etc.

I'm fairly technical so I could probably provide further information if told where/how to look.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1
Uname: Linux 3.5.0-21-generic x86_64
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_64 Kernel Module 304.43 Sun Aug 19 20:14:03 PDT 2012
 GCC version: gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
.tmp.unity.support.test.0:

ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,imgpng,unitymtgrabhandles,vpswitch,gnomecompat,snap,mousepoll,move,place,regex,wall,grid,resize,animation,session,expo,workarounds,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: kwin
Date: Thu Jan 17 16:13:27 2013
DistUpgraded: 2012-10-20 14:00:00,243 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: kubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
 NVIDIA Corporation GF119 [Quadro NVS 4200M] [10de:1056] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0494]
InstallationDate: Installed on 2011-05-09 (618 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
JockeyStatus:
 kmod:nvidia_experimental_304 - Experimental NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_experimental_310 - Experimental NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_current - nvidia_current (Proprietary, Enabled, Not in use)
 kmod:nvidia_current_updates - NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
MachineType: Dell Inc. Latitude E6520
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-21-generic root=UUID=d36752b2-deff-457d-9cba-ae832ff02e63 ro reboot=pci quiet splash
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to quantal on 2012-10-20 (89 days ago)
dmi.bios.date: 03/02/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A01
dmi.board.name: 0J4TFW
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA01:bd03/02/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0J4TFW:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6520
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.8.6-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.1
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

[obrut (gustaf)]

I have something like this. In my case it only happens at my home office, wifi and/or ethernet. If ethernet is connected the freeze hangs/floods (haven't checked what actually is happening) the network which will not work until I unplug ethernet or reboot the laptop.
Tried Unity, KDE and XFCE, seems like XFCE is bit more stable. Have disabled IPv6 and all energy savings options.
My computer only freezes when I'm afk.
Have the same software/hardware as the initial reporter.

[dino99 (9d9)]

That version is no more supported; please open a new bug report if the actual archive found version also has the same issue.