Thermal fan on PIIIDME

phil at netroedge.com phil at netroedge.com
Thu Jun 20 01:22:28 CEST 2002


If you want to experiment, you could try to disable initialization in
the lm87.c module.  Edit this:

        /* Initialize the LM87 chip */
        lm87_init_client(new_client);
        return 0;

to:

        /* Initialize the LM87 chip */
        /* lm87_init_client(new_client); */
        return 0;

Then rebuild/reinstall/whatever...

And see what you get.  You can also examine the lm87_init_client
function if you want to see exactly what it is doing.

Let me know what you find out!


Phil

On Thu, Jun 20, 2002 at 12:11:08AM +0100, Chris Rankin wrote:
>  --- phil at netroedge.com wrote: > 
> > Oh, boy, I'm not sure.  It sounded like the fan was
> > controlled by an
> > LM87.  What controls the LM87?  It seems obvious to
> > me that the LM87's
> > must be controlled exclusively through the SMBus. 
> > It's possible that
> > ACPI (or some other Bios thing?) is controlling the
> > LM87 via the
> > SMBus, but I'm not an ACPI expert. 
> 
> Just "for laughs", I rebooted without loading the i2c
> modules (i2c-i801, lm87, eeprom and dependents) and I
> am now hearing the sound of the thermal fan! So what
> we have now is a classic catch-22 because I can no
> longer know whether the fan is cutting in at the
> correct temperature!
> 
> Chris
> 
> 
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-- 
Philip Edelbrock -- IS Manager -- Edge Design, Corvallis, OR
   phil at netroedge.com -- http://www.netroedge.com/~phil
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