Eu encontrei a solução para o meu ventilador Compaq 6720s e o Ubuntu 13.04 aqui :
Crie o arquivo ”/etc/pm/sleep.d/99fancontrol.sh”, insira o código abaixo e chmod 755. Script:
#!/bin/sh
#
#
case "" in
hibernate|suspend)
# Stopping is not required.
;;
thaw|resume)
# In background.
echo -n 0 > /sys/devices/virtual/thermal/cooling_device0/cur_state;
sleep 2
echo -n 0 > /sys/devices/virtual/thermal/cooling_device1/cur_state;
sleep 2
echo -n 0 > /sys/devices/virtual/thermal/cooling_device2/cur_state;
;;
*) exit $NA
;;
esac