Xorg freeze

[David Oxland]

Occasional lockups with corruption of screen. 60% of screen corrupted by centered horizontal bar.
calling for restart usually brings correct startup
additionally
Occasionally on start terminal type tty1 type start screen is given calling for login name which disappears after a short time and normal login screen is offered and works.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
Uname: Linux 3.11.0-15-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 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9)
.tmp.unity.support.test.0:

ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
CheckboxSubmission: 2b3340a42a0e3c8fe3b0bde3b515a461
CheckboxSystem: d00f84de8a555815fa1c4660280da308
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
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Fri Jan 10 22:32:31 2014
DistUpgraded: 2013-10-18 15:25:29,744 DEBUG enabling apt cron job
DistroCodename: saucy
DistroVariant: ubuntu
DkmsStatus:
 nvidia-304, 304.88, 3.11.0-14-generic, i686: installed
 nvidia-304, 304.88, 3.11.0-15-generic, i686: installed
ExtraDebuggingInterest: Yes, if not too technical
GpuHangFrequency: Once a week
GpuHangReproducibility: Seems to happen randomly
GpuHangStarted: Since a couple weeks or more
GraphicsCard:
 NVIDIA Corporation NV41M [GeForce Go 6800] [10de:00c8] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:019c]
InstallationDate: Installed on 2013-01-07 (369 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
JockeyStatus:
 kmod:nvidia_304 - nvidia_304 (Proprietary, Enabled, Not in use)
 kmod:nvidia_304_updates - NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_173 - NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
MachineType: Dell Inc. Inspiron 9300
MarkForUpload: True
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=b6656d4a-b6f0-4604-aa7a-3363b0e3f7aa ro quiet splash
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to saucy on 2013-10-18 (84 days ago)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 06/21/2005
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0C5668
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd06/21/2005:svnDellInc.:pnInspiron9300:pvr:rvnDellInc.:rn0C5668:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 9300
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.libdrm2: libdrm2 2.4.46-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Fri Jan 10 22:25:18 2014
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
 open /dev/dri/card0: No such file or directory
 open /dev/fb0: No such file or directory
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.14.5-1ubuntu2~saucy1

[David Oxland (doxland)]

addendum
Occasional lockups with corruption of screen. 60% of screen corrupted by centered horizontal bar. Remainder black.