System powers off instead of suspending (MSI K8T Neo)

[unggnu]

If I suspend the system everything seems to work fine but as soon as I power it on again the system boots like after a normal shutdown.

The same happens with the mainline Kernel 2.6.33 but it works fine with Windows XP.

Motherboard: MSI K8T Neo
Chipset: Via K8T800
Graphic: Radeon 9800 XT

ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: bomber 1092 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Live'/'SB Live! Value [CT4830] (rev.7, serial:0x80261102) at 0xd000, irq 19'
   Mixer name : 'SigmaTel STAC9721,23'
   Components : 'AC97a:83847609'
   Controls : 220
   Simple ctrls : 42
Date: Wed Mar 17 22:01:53 2010
DistroRelease: Ubuntu 10.04
InstallationMedia: Error: [Errno 13] Permission denied: '/var/log/installer/media-info'
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: MSI MS-6702
Package: linux-image-2.6.32-16-generic 2.6.32-16.25
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-16-generic root=UUID=3c0dcd65-8c85-4908-a73e-7ec4b9a04f74 ro quiet splash
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
Regression: No
RelatedPackageVersions: linux-firmware 1.32
Reproducible: Yes
RfKill:

SourcePackage: linux
TestedUpstream: Yes
Uname: Linux 2.6.32-16-generic i686
dmi.bios.date: 04/02/01
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: Version 07.00T
dmi.board.name: MS-6702
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: 0123ABC
dmi.chassis.type: 3
dmi.chassis.vendor: Uknown Chassis Manufacture
dmi.chassis.version: Version 1.00
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrVersion07.00T:bd04/02/01:svnMSI:pnMS-6702:pvr1.0:rvnMSI:rnMS-6702:rvr1.0:cvnUknownChassisManufacture:ct3:cvrVersion1.00:
dmi.product.name: MS-6702
dmi.product.version: 1.0
dmi.sys.vendor: MSI

[unggnu (unggnu)]

After removing the USB cable of the SideWinder Game Voice device suspend seems to work fine. I don't know why this works with Windows XP but I don't think that it is relevant. Closing.