w83627hf driver: one pwm value, two fan speeds?

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Hi,

While trying to control the CPU temperature with the fan speed on a
P4P800 motherboard + P4 CPU with the w83627hf driver (kernel
2.6.11-rc4) just like Asus's Q-Fan (see http://www.wingding.demon.nl/
for qfan.rb), I encountered a strange effect.

Doing

cd /sys/devices/platform/i2c-1/1-0290
echo 240 > pwm2
sleep 1
echo 192 > pwm2

.will stabilize at a fanspeed of around 3229, while changing the 240
to 128 will give a fanspeed of around 2136.

Somehow a 'state' is kept somewhere, or the driver has a bug. Is this
a known bug?

Regards,
Rutger.

-- 
Rutger Nijlunsing ----------------------------------------------------
never attribute to a conspiracy which can be explained by incompetence
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