Comment 0 for bug 940564

It's possible that this is an extreme corner case, (my hardware), 8400m chipsets in general or a bit more widespread.
So i'm opening this report in case it's one of the latter 2

It occurs like this:
After the install or upgrading to the .20 drivers shutdowns/restarts works as expected.
This lasts for at least 3 normal uses of either, by normal I mean boot up, use the session a bit, then do a shutdown or restart.

Somewhere between the 4 - 8 attepmt either a shutdown or restart fails to complete properly.
Once this occurs it then continues for all subsequent attempts, there may be an occasional exception to that, if needed I can relay, in any event the respite is only temporary, basically a reset of the above

What happens is this -
My normal shut down or restart takes about 2.5 sec's, after clicking either the restart or shutdown button there is a screen flash, then a plymouth splash for 2 sec's, then the machine either shuts down or restarts as normal.

When it fails - as soon as the button is clicked the display is immediately shut off, there is harddrive activity for about 2 sec's, then nothing else.
The machine remains powered on, the harddrive stays spinning, all else is like it was shutdown. Recovery is only possible holding the power button down for 10 sec's to affect a forced power off

Have tested completly here with multiple installs, both from A2 upgraded & any number of installs from the dailies, same exact thing.

Meanwhile this never occurs with the .10 driver, which baring this just 'going away' will be the one I'll use, now & come release

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: nvidia-current 295.20-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic-pae 3.2.6
Uname: Linux 3.2.0-17-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 295.20 Mon Feb 6 20:25:38 PST 2012
 GCC version: gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-14ubuntu2)
.tmp.unity.support.test.0:

ApportVersion: 1.93-0ubuntu2
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,snap,gnomecompat,regex,resize,place,mousepoll,animation,move,vpswitch,expo,wall,ezoom,session,fade,scale,unityshell]
CompositorRunning: compiz
Date: Fri Feb 24 14:05:34 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus: nvidia-current, 295.20, 3.2.0-17-generic-pae, i686: installed
GraphicsCard:
 NVIDIA Corporation G86 [GeForce 8400M GS] [10de:0427] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0209]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120220)
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: Dell Inc. XPS M1330
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic-pae root=UUID=0f691c02-28fb-4367-ac9c-6a4c52fb79c2 ro quiet splash vt.handoff=7
SourcePackage: nvidia-graphics-drivers
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
 Section "Device"
   Identifier "NVIDIA GeForce"
   Driver "nvidia"
   Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x3322; PowerMizerDefaultAC=0x1"
 EndSection
dmi.bios.date: 12/26/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu5
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2