From owner-freebsd-acpi@FreeBSD.ORG  Thu Apr  6 19:27:21 2006
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From: Hiroharu Tamaru <tamaru@myn.rcast.u-tokyo.ac.jp>
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Cc: Nate Lawson <njl@FreeBSD.org>
Subject: Re: Is hw.pci.do_powerstate expected to be casually tuned?
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I think I spoke too early...

OK. I retried RELENG_6 kernel and learned that

$FreeBSD: src/sys/dev/pci/pci.c,v 1.298 2005/09/21 19:47:00 imp Exp $

and a subsequent MFC

$FreeBSD: src/sys/dev/pci/pci.c,v 1.292.2.3 2005/09/27 05:57:47 imp Exp $

has split hw.pci.do_powerstate=1 into
hw.pci.do_power_resume=1
hw.pci.do_power_nodriver=0

FIVA 206VL needs hw.pci.do_power_resume=0, while do_power_nodriver can
be > 0.

So I'm now seeing that these are in fact expected to be tuned by an
user depending on their hardware. ;-)

Maybe, a better question would then be...
Would it make sense to force do_power_resume = 0 when doing a S4BIOS?
Is the current behavior tested on any other S4BIOS capable machine?

Thanks, always.
-- 
Hiroharu Tamaru