I've got the same behaviour on my thinkpad s30, to get the fan stopped I have to issue
sudo -s echo -n "0" > /proc/acpi/fan/FN1/state echo -n "3" > /proc/acpi/fan/FN1/state exit
yes, I have to turn the fan 'on' even though it's already spinning away to be able to turn it off. After that the behaviour of those commans is standard.
I've got the same behaviour on my thinkpad s30, to get the fan stopped I have to issue
sudo -s fan/FN1/ state fan/FN1/ state
echo -n "0" > /proc/acpi/
echo -n "3" > /proc/acpi/
exit
yes, I have to turn the fan 'on' even though it's already spinning away to be able to turn it off. After that the behaviour of those commans is standard.