Shutdown problem "Stray IRQ9"

[vincent delft]

As new to FreeBSD I'm looking for info to solve my
shutdown problem.

When I shutdown the system (shutdown -h now), the
messages displayed are:
"
No buffers busy after final sync
Uptime: 1h3m35s
Shutting down ACPI
stray irq9    
"
then hang ;-(.


I've google a bit on "stray irq9" and found several
mails where people says that this is a known problem,
or saying that we should don't care about this, ...

What's the current status ? (parameters, options,
patches, ...)
Could I let this like that ? 

I'm on a ECS K7S5A with FBSD-6.1-Stable.

Thanks.

PS:
On the same machine, my gentoo can shutdown correctly.
Thus I would conclude that this is not HW related.




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