No acpi.thermal on ASUS M2A-VM HDMI

[Gordon work]

Hi all,

I have an ASUS M2A-VM HDMI motherboard running the latest BIOS.
All power management features, in particular AMD "Cool and Quiet"
and Q-Fan control are enabled, but the system seems oblivious to
temperature and the fans always runs at the same (noisy) speed.
The temperature is always given as 40C, which I have read elsewhere
is a default value.

I would like to control the fan speed.  I am not concerned with other
ACPI features.

Does anyone happen to know of any kernel or APM tweaks that might get
ACPI thermal working on this board?

System particulars follow:

% uname -a
FreeBSD localhost 7.0-BETA3 FreeBSD 7.0-BETA3 #4: Sun Dec 16 12:45:34 CST 2007     root at localhost:/usr/obj/usr/src/sys/CUSTOM  amd64

% kldstat
Id Refs Address            Size     Name
 1    5 0xffffffff80100000 7600d8   kernel
 2    1 0xffffffff80861000 1a570    snd_hda.ko
 3    2 0xffffffff8087c000 673b8    sound.ko
 4    1 0xffffffff808e4000 5fd0     acpi_asus.ko

% sysctl hw.acpi.thermal
hw.acpi.thermal.min_runtime: 0
hw.acpi.thermal.polling_rate: 10
hw.acpi.thermal.user_override: 0
hw.acpi.thermal.tz0.temperature: 40.0C
hw.acpi.thermal.tz0.active: -1
hw.acpi.thermal.tz0.passive_cooling: 1
hw.acpi.thermal.tz0.thermal_flags: 0
hw.acpi.thermal.tz0._PSV: 73.0C
hw.acpi.thermal.tz0._HOT: -1
hw.acpi.thermal.tz0._CRT: 75.0C
hw.acpi.thermal.tz0._ACx: 73.0C -1 -1 -1 -1 -1 -1 -1 -1 -1
>

Verbose dmesg output is at:
http://tkgeomap.org/acpi/dmesg.boot

acpidump -dt output is at:
http://tkgeomap.org/acpi/acpidump.out

Thanks in advance!
Gordon in Oklahoma