No acpi.thermal on ASUS M2A-VM HDMI

[Nate Lawson]

Gordon work wrote:
> 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

If it's just returning a fixed value of 40C, you should try an external
application that reads the temp directly.  For instance, the lmsensors port.

The ASL itself has the hardcoded value in it, meaning the BIOS vendor
never intended to give ACPI access to the temperature.

-- 
Nate