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Date: Sat, 17 May 2003 10:47:59 -0700 (PDT)
From: Nate Lawson <nate@root.org>
To: Olev <olev@bsd.ee>
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Subject: Re: [acpi-jp 2249] ACPI problems with -current on Dell LatitudeC600
	laptop
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On Sat, 17 May 2003, Olev wrote:
> Upgrading my Dell Latitude C600 from 5.0 to -current I started to notice
> strange errors with ACPI. From boot -v:
> acpi_cmbat0: battery initialization start
>      ACPI-0293: *** Warning: Buffer created with zero length in AML
>
> It gives this warning many times and after init:
>      ACPI-0293: *** Warning: Buffer created with zero length in AML
>          -0166: *** Error: UtAllocate: Attempt to allocate zero
>
> and finally:
> acpi_acad0: acline initialization done, tried 7 times
> acpi_cmbat0: battery initialization failed, giving up
> acpi_cmbat1: battery initialization failed, giving up
>
> So fBSD thinks, that the laptop is running with no batteries and apm
> shows the same. Any fix to this problem? 5.0 was running nicely and apm
> showed information about the battery life etc. Hope this gets fixed
> before 5.1 release. Full dmesg @ http://bsd.ee/~olev/dmesg

This is a known problem and is being tracked down on another thread.  I
can not reproduce it on any of my boxes.

http://home.jp.freebsd.org/mail-list/acpi-jp/

The last message in the thread is:
http://home.jp.freebsd.org/cgi-bin/showmail/acpi-jp/2244

-Nate