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Date: Sat, 06 Oct 2001 21:51:06 -0700
From: Mike Smith <msmith@freebsd.org>
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Subject: [acpi-jp 1335] Re: Weirdest ACPI failure 
Errors-To: owner-acpi-jp@jp.freebsd.org
Sender: owner-acpi-jp@jp.freebsd.org
X-Originator: msmith@freebsd.org

> Hi,
> 
> today I started experiencing some very weird failures on my laptop (Thinkpad
> 570E). I got:
> 
> [...]
> Using $PIR table, 10 entries at 0xc00fdef0
> ACPI-0446: *** Warning: Invalid checksum (4c) in table FACP
> ACPI-0305: *** Warning: Invalid table signature ^BOOT found

The ^ in front of the 'B' here is a giveaway, as is:

> ACPI-0305: *** Warning: Invalid table signature RSD^T found

This one here.  Both are a single-bit memory error (bit cleared).

Check and reseat your RAM first.  It's also possible that something is 
trampling the ACPI data, although that's less likely, since it *should* 
be in a protected memory area, and it would have to be a 
read-modify-write bug.

-- 
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also.  But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view.  [Dr. Fritz Todt]
           V I C T O R Y   N O T   V E N G E A N C E


