[lm-sensors] v1211 fan control

[Juerg Haefliger]

Hi Sergio,


On Mon, Jun 2, 2008 at 10:31 PM, Sergio Bruder <sergio at bruder.com.br> wrote:

> Ive recently builded a (almost) fanless little server around a EPIA
> LN10000EG with a VIA C7 1GHZ fanless, a little case with a 60W PSU and
> a desktop (3.5") HD. The case has a small and loud fan, that I plugged
> in as cpu fan.
>
> Im using a C7-compiled-for version of Ubuntu 8.04 server kernel
> (2.6.24-17-server).
>
> Ive compiled the kernel for C7, using e_powersaver, acpi=force,
> hpet=force (powertop is showing 2-3 wakeups per second, cool, but my
> cpu isnt entering C3, only C2. but that is another problem).
>
>  VT1211 has pwm fan control, but I dont know what temperature is
> driving the "auto control", and the unique variation that I can get is
> fully on with auto control turned off and completely turned off with
> auto control turned on (echo 2). So I hacked a little cronjob that
> turns auto control on and off to indirectly turn fan off and on using
> the temp2 result of sensors (the unique temperature that appears sane)
> until a better solution is found.
>
> My goal is to configure the fan control map to never trigger "full
> trottle" of the fan.
>
> What is the temperature that are controlling the fan auto control?
>

Have you read Documentation/hwmon/vt1211 in the kernel source tree? Can you
send the output of 'sensors' and 'grep "" /sys/class/hwmon*/device/*''?

...juerg



> Sergio Bruder
>
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