From owner-freebsd-stable@FreeBSD.ORG  Tue Mar 15 06:00:49 2005
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Date: Mon, 14 Mar 2005 22:00:49 -0800 (PST)
From: Doug White <dwhite@gumbysoft.com>
To: Dan Ponte <dcp1990@neptune.atopia.net>
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cc: stable@freebsd.org
Subject: Re: ACPI errors on boot
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On Sat, 12 Mar 2005, Dan Ponte wrote:

> I've been seeing lots of ACPI errors in my dmesg lately. They haven't
> really affected functionality (yet!), but I'd like to see them resolved
> nonetheless. I've googled all around, could not find a hint of a
> solution. This machine is an ASUS CUSL2 motherboard with BIOS revision
> 1009. Below is my dmesg.

ASUS motherboards are known to have broken ACPI code so this isn't too
suprising.

>     ACPI-0252: *** Error: No object was returned from [\\_SB_.PCI0.PX40.UAR2._STA] (Node 0xc15b8dc0), AE_NOT_EXIST

This appears to be trying to get resource information for uart #2 (sio1).
Since that port probes OK anyway its likely harmless.

If you want to try to clear these up, try a BIOS update first (if
available), then look for a replacement DSDT table. You can use the loader
options described in acpi(4) to load the fixed table.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org