linux-kernel - Re: Intel PCI-E bridge ACPI resources and possibly related SATA unstability problems on ASUS A8Js

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Date:	Fri, 26 Jan 2007 23:03:14 +0800
From:	"Luming Yu" <luming.yu@...il.com>
To:	"Martin Drab" <drab@...ler.fjfi.cvut.cz>
Cc:	"Oleg Verych" <olecom@...wer.upol.cz>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: Intel PCI-E bridge ACPI resources and possibly related SATA unstability problems on ASUS A8Js

On 1/26/07, Martin Drab <drab@...ler.fjfi.cvut.cz> wrote:
> On Thu, 25 Jan 2007, Oleg Verych wrote:
>
> > On Thu, Jan 25, 2007 at 01:28:56PM +0100, Martin Drab wrote:
> > > On Thu, 25 Jan 2007, Oleg Verych wrote:
> > >
> > > > gmane.linux.kernel:
> > > > > recently I got my hands on an ASUS A8Js notebook (Core 2 Duo T7200,
> > > > > Intel 945 PM PCI-E Chipset, for details see attached log). After booting
> > > > > the latest 2.6.20-rc5-git3 kernel (but the same behaviour occurs also with
> > > > > the 2.6.19.2, didn't try any other), some strange behaviour can be
> > > > > observed.
> > > >
> > > > There were disscussions about mmconfig and what nightmare it brought to
> > > > PCI(E) configuration in scope of BIOS, chip bugs. Here's (one of) such:
> > > > <http://marc.theaimsgroup.com/?l=linux-kernel&m=116007091004503&w=2>
> > > >
> > > > > At first the following messages appear in the log:
> > > > >
> > > > > ...
> >       [   40.303154] PCI: BIOS *Bug*: MCFG area at e0000000 is not E820-reserved
> > > > > [   40.303157] PCI: Not using MMCONFIG.
> > > > >
> > > > > (not sure whether this is really a problem)
> > > >
> > > > I think it may be the major problem.
> > >
> > > Hmm, it may be. Was there suggested any solution (or at least proposal)
> > > that I may try?
> >
> > Try fix BIOS bugs: <http://permalink.gmane.org/gmane.linux.kernel/462632>
>
> ASUS refused to help fixing the BIOS with words that ASUS notebooks do not
> support Linux. So if we do not workaround this somehow, Linux would really
> be unusable on this HW. :(
>
Does pci=nommconf work for you. Also why not use memmap=exactmap  ...
boot command line to workaround this bios bug?
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