Re: control system fan with software

Dear Michael,

thank you very much for your hints.

After sensors-detect, I got modules to load, and after loading i2c-viapro,
i2c-isa and w83627hf, I got:

/sys/devices/platform/i2c-9191/9191-0290/pwm3
/sys/devices/platform/i2c-9191/9191-0290/pwm2
/sys/devices/platform/i2c-9191/9191-0290/pwm1

The files have the following contents:

pwm1: 240
pwm2: 240
pwm3: 0

I am a bit afraid of simply echoing arbitrary things into these files. Is
there a documentation? Can I get hardware damage?

Thanks,
Magnus



Michael Mauch wrote:

Magnus Warker wrote:

my kernel has support for acpi, as shown below.

I assume that ACPI_FAN is important for me. But how can I actually modify
the fan?

I have no idea about the ACPI fan module, but with your board it should
be possible to load the w83627hf (or a similar) module - try
sensors-detect from the lm-sensors package. You should get "pwm*" files
somewhere in /sys/devices/platform (try 'find /sys/devices/platform
-name "pwm*"').

If you have these "files", you can write to them, e.g. with "echo" in a
shell script, and read them with "cat". There is also a ruby script that
reads the temperature sensors and sets the fans to your liking,
<http://freshmeat.net/projects/qfan/>. And there are a "fancontrol" Bash
script and a "fancontrol.pl" Perl script in the lm-sensors package.

Regards...
Michael

.

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