FAN control howto

[Nate Lawson]

Hanspeter Roth wrote:
>   On Aug 23 at 20:49, LeBaBouk spoke:
>>I've installed FreeBSD 5.2.1 on a Compaq B1013 laptop. All is quite 
>>fine but the machine remain very noisy. The FAN never stop. Does any 
>>one knows how to control them (if it's possible)
> 
> The fan is probably controlled via the CPU.
> Is CPU running at 100%? Is the idle process consuming >=98%?
> If so my might have the WITNESS option enabled in the kernel
> configuration. If so try without WITNESS.

Not likely the reason but worth looking into.  He should try a more 
recent 5.3-BETA.  Unfortunately, if the fans are controlled by the BIOS 
and not ACPI (i.e. no fan objects referenced by the thermal zone) 
there's not much we can do.

-- 
Nate