t420 fan management on fedora

so my lenovo t420 would keep heating up and then suddenly shutting down. not cool when you have mysql running coz then you got to remove the stale pid. so i finally got round to doing some research and this is what i came up with

the archwiki says to install thinkfan and then configure it. then this page over at lenovo says to use a couple of extra sensors. the end result is my thinkfan.conf now has these extra lines

sensor /sys/devices/virtual/thermal/thermal_zone0/temp
sensor /sys/devices/platform/coretemp.0/temp1_input
sensor /sys/devices/virtual/hwmon/hwmon0/temp1_input

and i can hear the fan revving up and down. and that makes me happy

edit: 12/03/2014

after some testing, which is still incomplete, i have come up with this

yum -y install thinkfan

echo "options thinkpad_acpi fan_control=1" | sudo tee /etc/modprobe.d/thinkpad_acpi.conf

cp /usr/share/doc/thinkfan/examples/thinkfan.conf.thinkpad /etc/thinkfan.conf

find /sys/devices -type f -name "temp*_input" | xargs -n 1 echo sensor >> /etc/thinkfan.conf

chkconfig thinkfan on
service thinkfan restart
service thinkfan status