I'm using Ubuntu 11.10 and Unity 3d (gnome shell also works), adding
UNITY_FORCE_START=1 to /etc/environment and I'm using "NVIDIA (post release
updates)(version 173-updates)" drivers from system settings -> drivers (I'm
italian, don't remember the correct english path).
Using nvidia-settings drivers version displayed is: 173.14.30
Works good on my HP DV6000 (4 years ago laptop) and GeForce Go 7400 256Mb,
Ubuntu installed from scratch (no update from 11.04).

Hope it will help someone, cheers :)

2011/10/17 Felipe Castillo <email address hidden>

> I'm also willing to provide any necesary info so this bug can be changed
> to valid and some progress can be done...
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/726496
>
> Title:
>  Cannot use Unity or Classic desktop with effects after the latest
>  nvidia+xorg update
>
> Status in Compiz:
>  Invalid
> Status in Unity:
>  Invalid
> Status in “compiz” package in Ubuntu:
>  Invalid
> Status in “nvidia-graphics-drivers” package in Ubuntu:
>  Incomplete
>
> Bug description:
>  Binary package hint: compiz
>
>  After having updated nvidia+xorg, whenever I try to log into the
>  session, either using Unity or the Classic deskop session with
>  effects, the UI remains frozen.
>
>  By frozen I mean I get either a static picture of the desktop, a black
>  screen or a blank one, but I can still move the mouse cursor.
>  Restarting compiz or unity does not make a difference.
>
>  The only workaround seems to be to log back in using the Classic
>  desktop (No effects) session.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 11.04
>  Package: compiz 1:0.9.4-0ubuntu1
>  ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
>  Uname: Linux 2.6.38-5-generic i686
>  NonfreeKernelModules: nvidia
>  .proc.driver.nvidia.gpus.0: Error: [Errno 21] És un directori:
> '/proc/driver/nvidia/gpus/0'
>  .proc.driver.nvidia.registry: Binary: ""
>  .proc.driver.nvidia.version:
>   NVRM version: NVIDIA UNIX x86 Kernel Module  270.29  Wed Feb 23 16:16:53
> PST 2011
>   GCC version:  gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-3ubuntu3)
>  Architecture: i386
>  CompizPlugins: No value set for
> `/apps/compiz-1/general/screen0/options/active_plugins'
>  CompositorRunning: None
>  Date: Mon Feb 28 12:41:46 2011
>  DistUpgraded: Yes, recently upgraded Log time: 2011-01-17 22:01:54.962391
>  DistroCodename: natty
>  DistroVariant: ubuntu
>  DkmsStatus:
>   virtualbox-ose, 4.0.4, 2.6.38-5-generic, i686: installed
>   nvidia-current, 270.29, 2.6.38-5-generic, i686: installed
>  GraphicsCard:
>   nVidia Corporation G72M [Quadro NVS 110M/GeForce Go 7300] [10de:01d7]
> (rev a1) (prog-if 00 [VGA controller])
>     Subsystem: Lenovo Device [17aa:3839]
>  MachineType: LENOVO 0769AP2
>  PackageArchitecture: all
>  ProcEnviron:
>   LANGUAGE=ca_ES@valencia:ca:en_GB:en
>   LANG=ca_ES.UTF-8
>   LC_MESSAGES=ca_ES.utf8@valencia
>   SHELL=/bin/bash
>  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-5-generic
> root=UUID=c1368c5e-eecd-4c2d-ac4e-883437f7455b ro quiet splash vt.handoff=7
>  ProcVersionSignature_: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
>  Renderer: Unknown
>  SourcePackage: compiz
>  dmi.bios.date: 07/29/2008
>  dmi.bios.vendor: LENOVO
>  dmi.bios.version: 68ET37WW
>  dmi.board.name: IEL10
>  dmi.board.vendor: LENOVO
>  dmi.board.version: REFERENCE
>  dmi.chassis.asset.tag: No Asset Tag
>  dmi.chassis.type: 10
>  dmi.chassis.vendor: No Enclosure
>  dmi.chassis.version: N/A
>  dmi.modalias:
> dmi:bvnLENOVO:bvr68ET37WW:bd07/29/2008:svnLENOVO:pn0769AP2:pvr3000N200:rvnLENOVO:rnIEL10:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A:
>  dmi.product.name: 0769AP2
>  dmi.product.version: 3000 N200
>  dmi.sys.vendor: LENOVO
>  version.compiz: compiz 1:0.9.4-0ubuntu1
>  version.libdrm2: libdrm2 2.4.23-1ubuntu3
>  version.libgl1-mesa-glx: libgl1-mesa-glx
> 7.10.1~git20110215.cc1636b6-0ubuntu2
>  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
>  version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu8
>  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu2
>  version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.14.0-1ubuntu11
>  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
> 1:0.0.16+git20110107+b795ca6e-0ubuntu5
>
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>