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From: John Baldwin <jhb@freebsd.org>
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	(bigwig.baldwin.cx); Mon, 28 Mar 2011 14:06:28 -0400 (EDT)
Cc: freebsd-acpi@freebsd.org
Subject: Re: Atheros 9285 & Atheros AR8131
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On Monday, March 28, 2011 12:46:02 pm =D0=9A=D1=81=D0=B5=D0=BD=D0=B7=D0=BE=
=D0=B2 =D0=90=D0=BB=D0=B5=D0=BA=D1=81=D0=B5=D0=B9 wrote:
> 2011/3/29 Sergio de Almeida Lenzi <lenzi.sergio@gmail.com>
>=20
> >
> >  This is probably due to a problem FreeBSD has with ACPI initialization
> > sometimes wiping out the state in PCI-PCI bridges for resource windows =
and not
> > gracefully recovering from that.  I have some early work in progress to
> > address this, but it will be a while before I have something ready for
> > testing.
> >
> >
> >  it is the acer bios that is does not follow acpi standard... I have the
> > same problem
> > in an old acer 5050 no solution still...   I had to install linux in th=
at
> > notebook.
> >
> > My advice is not to buy acer... they are cheap any good...
> >
> > Well let's wait for the Baldwin fix....
> >
> >
> maybe this can be corrected by editing the ASL?

We've never figured out what is zeroing the registers in the PCI-PCI bridge=
s.
I suspect it is not something in the ASL, but is a side effect of some BIOS
code that runs in SMM when ACPI is turned on.

=2D-=20
John Baldwin