Missing One Fan A7M266 (Examined/Solved - lm_sensors 2.6.3 Linux 2.4.18-smp)

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On our asus a7m266-d SMP board, we have everyhing except the chassis fan. The

chasis fan gives 0 rpm. However, this fan shows up on the bios screen as alive

and well.

I have no idea as to how asus built this thing. Could they somehow read it in

the bios without putting the data out on the smbus ?? The other two fans read

out quite reasonably, as do everything except V5SB which is probably not read

by the chip anyhow.

Thanks in advance for your answer.

--- you didn't say what chip you have.

some chips have configurable pins and it may not be configured correctly.

If it's the w83781d module you can try 'modprobe w83781d init=0'

to not reinitialize the chip and save the BIOS configuration.

If that isn't it email us with further info,

reference your ticket number.

MDS 4/9/02

---

Solution from Ticket 961.

See also doc/fan-divisors for further info.

I suggest you add this into Ticket 866 at the end:

We had the same problem as reported in ticket 866.

The init=0 did not help

What did help was changing the value of fan_div

Try

echo "2 2 4" >> /proc/sys/dev/sensors/w83782d-i2c-0-2d/fan_div

or

echo "2 2 8" >> /proc/sys/dev/sensors/w83782d-i2c-0-2d/fan_div

Apparently on the A7M266-D motherboard, the third (Chassis) fan registers

zero if the RPM count is below some threshold. So if the fan_div value

is wrong, you get zero RPMS

Bruce Allen

ballen@…