From owner-freebsd-current@FreeBSD.ORG  Thu Apr 30 19:31:52 2009
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From: Jung-uk Kim <jkim@FreeBSD.org>
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Date: Thu, 30 Apr 2009 15:31:39 -0400
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Cc: Scott Ullrich <sullrich@gmail.com>
Subject: Re: ACPI Error (tbxfroot-0308): A valid RSDP was not found with
	todays CURRENT
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On Thursday 30 April 2009 02:44 pm, Scott Ullrich wrote:
> Hello,
>
> I am getting this panic on bootup with todays -CURRENT sources
> (seemed fine two days ago).
>
> "ACPI Error (tbxfroot-0308): A valid RSDP was not found [20070320]"
> on machine bootup with ACPI on or off.
>
> http://cvs.pfsense.com/~sullrich/pics/IMG_0377.JPG
>
> The box is sitting at the db> prompt if anyone would like me to do
> some troubleshooting.
>
> Unfortunately it seems to be too early to use a serial console but
> I can continue taking photos and posting (sorry about that).

It seems ACPI is not the root cause.

http://docs.freebsd.org/cgi/mid.cgi?a31046fc0904300937q6483002fy124ed918962c925c

Jung-uk Kim