I have a special effect on a Laptop with:
cpu: Intel(R) Core(TM) i5 CPU M 540 @ 2.53GHz with integrated graphics
Chipsatz: Intel QM57
with SLES11 SP1 (xen-4.0 with some patches from Novell)
I passed through the sound and WLAN pci controller to the guest.
I start a Windows 7 guest and while installing the driver for the WLAN
controller within Windows the power of the notebook got switched off.
I couldnt see any message on the serial console.
I tried Windows on bare metall and all runs very well. Later on starting this
Windows guest again the power got switched of after login into Windows - maybe
the WLAN driver got started there.
For a test I prepared a OpenSuSE 11.3 as HVM guest and were able to configure
the WLAN device without any problems.
And here I need some assistance to prevent the power off and to add some tracer
in the hypervisor.
By the way I have no problems with the sound device.
If wanted I can add more informations.
Company details: http://ts.fujitsu.com/imprint.html