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Date:      Wed, 30 Dec 2009 08:39:47 -0500
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-acpi@freebsd.org, Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>
Subject:   Re: FreeBSD 8.0 hangs on boot with ACPI enabled
Message-ID:  <200912300839.47463.jhb@freebsd.org>
In-Reply-To: <20091230082556.GD1637@uriah.heep.sax.de>
References:  <20091230082556.GD1637@uriah.heep.sax.de>

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On Wednesday 30 December 2009 3:25:56 am Joerg Wunsch wrote:
> I've got an old mainboard here which I wanted to use as a scratch
> machine now.  As I don't have the (PCI-based) VGA card anymore that
> used to work there, I found an older AGP-based card.  Using this card,
> FreeBSD (including 8.0-RELEASE) does not boot with ACPI enabled, it
> hangs when detecting the disks (right after the "md0: Preloaded
> image..." message).
> 
> If I disable ACPI, it boots fine.
> 
> As I cannot find a PCI-based VGA, I cannot test that anymore, but the
> board used to be my main working machine in the past, including ACPI.
> 
> Find both boot (verbose) messages attached, captured from a serial
> console.
> 
> Does anyone have any ideas?

I'm guessing that ahc0 doesn't like the the I/O port resource range it was 
assigned in the ACPI case.  No idea why ACPI would clobber that BAR.

-- 
John Baldwin



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