AE_NO_ACPI_TABLES Errors in FreeBSD 6.2-RELEASE on AMD 64 X2 installation

[Brendon Janos]

I have this motherboard:

	http://www.msicomputer.com/product/p_spec.asp?model=K9NBPM2-FID&class=mb

which claims to be:

	...
	ACPI & PC2001 compliant enhanced power management
	...

I've installed FreeBSD 6.2-RELEASE, updated to patchset 9, and
built/installed the AMD64/SMP kernel,

	uname -a
		FreeBSD server.localhost 6.2-RELEASE-p9 FreeBSD 6.2-RELEASE-p9 #0:
Thu Dec 13 23:15:00 PST 2007
brendonj at server.localhost:/usr/obj/usr/src/sys/SMP  amd64

The system boots fine, with both CPUs active & handling tasks.

However, I notice in dmesg output, few ACPI-related errors.

	Copyright (c) 1992-2007 The FreeBSD Project.
	Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
		The Regents of the University of California. All rights reserved.
	FreeBSD is a registered trademark of The FreeBSD Foundation.
	FreeBSD 6.2-RELEASE-p9 #0: Thu Dec 13 23:15:00 PST 2007
		brendonj at server.localhost:/usr/obj/usr/src/sys/SMP
	Timecounter "i8254" frequency 1193182 Hz quality 0
	CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ (2110.59-MHz K8-class CPU)
	  Origin = "AuthenticAMD"  Id = 0x60fb1  Stepping = 1
	  Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
	  Features2=0x2001<SSE3,CX16>
	  AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow+,3DNow>
	  AMD Features2=0x11f<LAHF,CMP,<b2>,<b3>,CR8,<b8>>
	  Cores per package: 2
	real memory  = 5100273664 (4864 MB)
	avail memory = 4055777280 (3867 MB)
	kbd1 at kbdmux0
->	ath_hal: 0.9.17.2 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
->		ACPI-0159: *** Error: AcpiLoadTables: Could not get RSDP, AE_NO_ACPI_TABLES
->		ACPI-0213: *** Error: AcpiLoadTables: Could not load tables:
AE_NO_ACPI_TABLES
->	ACPI: table load failed: AE_NO_ACPI_TABLES
	cpu0 on motherboard
	...

In #freebsd IRC, it was suggested that I file a PR about this.  But, I
thought I should first figure out if the problem is on my end, or
really with FreeBSD.

Any ideas as to what the problem may be, and suggestions as to what to
do about it?

Thanks

BrendonJ