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From: John Baldwin <jhb@freebsd.org>
To: freebsd-hackers@freebsd.org
Subject: Re: Atom Board ACPI API MOPNV10J failing since 9.1
Date: Tue, 21 Jan 2014 11:58:37 -0500
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 (bigwig.baldwin.cx); Tue, 21 Jan 2014 12:26:46 -0500 (EST)
Cc: Dirk Engling <erdgeist@erdgeist.org>,
 David Shane Holden <dpejesh@yahoo.com>
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On Wednesday, January 15, 2014 12:26:18 am Dirk Engling wrote:
> On 15.01.14 05:02, David Shane Holden wrote:
> 
> > I'm all for chalking this up to a subpar BIOS that ships with this
> > board, but if it might be a problem in FreeBSD that could rear its ugly
> > head somewhere else I'd like to help track down what's causing it.  I'll
> > try to find some time to test a Debian live CD and see how Linux handles
> > it tomorrow.
> 
> Look no further than FreeBSD pre 9.1, where my system worked flawlessly
> for several years despite the on board audio and ACHI settings. It would
> be interesting to see what has changed between 9.0 and 9.1.

One of the changes is that for ACPI devices we always reserve the
resources they claim even if the driver only asks for a subset
(previously we only claimed what the driver explicitly asked for).
This is important for making sure we don't hand a resource out to
another device that is actually in use by an ACPI device (just not
by the current driver).

-- 
John Baldwin