Screen corruption after using Guest User account from the Session Menu.

[Brian Buchanan]

Every time I use the Session menu to switch to the guest account and then log back out into my main user account either through the session menu again or the main login screen, screen corruption occurs.
Only the unity dash and right-click menus are drawn above the screen corruption.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu6
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic-pae 3.0.4
Uname: Linux 3.0.0-10-generic-pae 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 280.13 Wed Jul 27 16:55:43 PDT 2011
 GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-7ubuntu2)
Architecture: i386
BootLog:
 fsck from util-linux 2.19.1
 fsck from util-linux 2.19.1
 /dev/sda5: clean, 198713/3203072 files, 1330660/12800000 blocks
 /dev/sda7: recovering journal
 /dev/sda7: clean, 210766/22593536 files, 58352348/90351360 blocks
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,imgpng,move,resize,vpswitch,regex,animation,unitymtgrabhandles,workarounds,mousepoll,place,wall,gnomecompat,snap,session,grid,animationaddon,fade,expo,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Sun Sep 4 17:32:09 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard: nVidia Corporation G71 [GeForce 7900 GS] [10de:0292] (rev a1) (prog-if 00 [VGA controller])
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
MachineType: WinFast C51GM03
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-10-generic-pae root=UUID=e73e2240-3149-4c56-b165-acd42fb719ec ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 11/28/2005
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: C51MCP51
dmi.board.vendor: WinFast
dmi.board.version: FAB1.0
dmi.chassis.type: 3
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd11/28/2005:svnWinFast:pnC51GM03:pvrFAB1.0:rvnWinFast:rnC51MCP51:rvrFAB1.0:cvn:ct3:cvr:
dmi.product.name: C51GM03
dmi.product.version: FAB1.0
dmi.sys.vendor: WinFast
version.compiz: compiz 1:0.9.5.92+bzr2791-0ubuntu1
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Timo Aaltonen (tjaalton)]

I believe this is a dupe of bug 676166

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.