Laptop fan problem.

[Alexandre "Sunny" Kovalenko]

On Thu, 2004-12-16 at 11:51 +0000, Alex Zatelepin wrote:
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> Hello. I have a toshiba M30 laptop, on which I have installed freebsd 
> 5.3. I have enabled speedstep support with est and estctrl ports and 
> it seems to work except a little problem: the fan almost never turns 
> on and laptop turns really HOT! I have tried to change some sysctls 
> but they seem to be non-writable. here they are:
> 
> % sysctl -a|grep thermal
> hw.acpi.thermal.min_runtime: 0
> hw.acpi.thermal.polling_rate: 10
> hw.acpi.thermal.tz0.temperature: 3512
> hw.acpi.thermal.tz0.active: -1
> hw.acpi.thermal.tz0.thermal_flags: 0
> hw.acpi.thermal.tz0._PSV: 3912
> hw.acpi.thermal.tz0._HOT: -1
> hw.acpi.thermal.tz0._CRT: 3922
> hw.acpi.thermal.tz0._ACx: 3912 3912 -1 -1 -1 -1 -1 -1 -1 -1
> 
> 391,2 K -- I think it is rather high :) How to change this or make the 
> fan turn on more frequently?
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In the simplest case, you need to look for something like 

	Method(_AC0) { Return "some temperature" }
	Method(_AC1) { Return "some temperature" }

in your ASL and change it to something lower. You will have to recompile
you ASL and load it at the boot time after that. ACPI section of the
Handbook is very helpful.

You have not mentioned what FreeBSD version you are running -- by the
look of the output, I would guess 5.1 or 5.2. If this is the case, you
might want to consider upgrade to 5.3--stable, ACPI have seen
considerable amount of change.
-- 
Alexandre "Sunny" Kovalenko (Олександр Коваленко)