Re: [Xen-users] Xen domU version compatibility questions

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> > I don't know of any showstoppers for doing this with either Windows or
> > Linux guests (whereas if you used an older Xen, say 3.0.3, then HVM ACPI
> > wasn't available and that's likely to cause more problems).
>
> I've always thought power save was an acpi function but my Windows hvm
> guest doesn't provide a power settings button on the screensaver tab of
> Explorer's Properties dialog. (fc8 compiles xen.gz  from 3.1.0 rc7 sources,
> but recently updated the tools to 3.1.2)

ACPI is involved in powersaving stuff but it's used for a load of other things 
as well.  It's used to set up SMP and interrupts, to support those funny 
extra buttons you get on laptops, to get information about docking 
stations ...  It's actually quite a scary and complex piece of technology and 
I don't understand it well at all.

I seem to recall that Windows doesn't make it easy to switch on / off ACPI 
support, hence switching to an older Xen version that doesn't have it having 
installed Windows on a newer version is likely to upset things.  Not an issue 
for normal use.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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