Tente esta configuração, ela funciona bem em um Lenovo ThinkPad L512 / L520:
Instale o thinkfan
sudo apt-get install -y thinkfan
Configure os módulos do kernel
echo "options thinkpad_acpi fan_control=1" > /etc/modprobe.d/thinkpad_acpi.conf
Recarregar o módulo do kernel
modprobe -r thinkpad_acpi && modprobe thinkpad_acpi
Configure o thinkfan
sudo sed -i 's|START=no|START=yes|' /etc/default/thinkfan
sudo sed -i 's|DAEMON_ARGS="-q"|DAEMON_ARGS="-q -b 1 -s 15"|' /etc/default/thinkfan
cat <<EOF> /etc/thinkfan.conf
hwmon /sys/devices/virtual/hwmon/hwmon0/temp1_input
(0, 0, 65)
(1, 65, 70)
(2, 70, 75)
(3, 75, 80)
(4, 80, 85)
(5, 85, 90)
(7, 90, 32767)
EOF
Reinicie o daemon do thinkfan
/etc/init.d/thinkfan restart