Re: fan control

Daniele Boffi
2003-05-02T11:43:02Z

> Ok, four trip points, four FAN "devices"/states, lowest one at 40 deg.
> You told us that your lowest temperature is about 50 deg. Hence the last one
> should be on and you don't see it => something to investigate.
>

In this moment:

$ cat /proc/acpi/thermal_zone/TZ1/temperature
temperature: 50 C

$ cat /proc/acpi/fan/FAN*/state
status: on
status: off
status: off
status: off

(I changed the name of the fans to the more readable FAN[0-3], OK?)

This is correct.
If I echo -n 3 > /proc/acpi/fan/FAN0/state

then the fan stops.
After reaching the second trip point, the fan starts up and I have the
following status report

$ cat /proc/acpi/fan/FAN*/state
status: off
status: on
status: off
status: off

This is what is strange.

> What hardware are you using?

Compaq Evo N800v

Cheers,

Daniele