mbar
Veteran
Joined: 19 Jan 2005
Posts: 1990
Location: Poland
|
 Posted: Sun Nov 27, 2005 6:11 pm Post subject: Modified fancontrol script for ACPI only systems |
 |
|
If you have a motherboard without hw sensors (or lm_sensors show only BS, like on my ECS 760GX-M mobo, its IT87 CPU temp input isn't connected to the chip and floats) and want to use pwmcontrol to dynamically set fan speeds to low when CPU has low temperature, you cannot simply use "fancontrol" script form lm_sensors. But you might get lucky and have ACPI support, showing actual thermal zone(s) temerature(s). This is often the case with laptops, and with my cheapo ECS 760GX-M: its CPU temp sensor is active only in ACPI subsystem. But it has no BIOS fan control (Cool&Quiet). Here's what I did to enable ACPI temp monitoring instead of using b0rked IT87 sensors:
- copy /usr/sbin/fancontrol to /usr/sbin/acpifancontrol
- modify lines:
| Code: | # main function
function UpdateFanSpeeds {
let fcvcount=0
while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
do
#hopefully shorter vars will improve readability:
pwmo=${AFCPWM[$fcvcount]}
tsens=${AFCTEMP[$fcvcount]}
fan=${AFCFAN[$fcvcount]}
mint=${AFCMINTEMP[$fcvcount]}
maxt=${AFCMAXTEMP[$fcvcount]}
minsa=${AFCMINSTART[$fcvcount]}
minso=${AFCMINSTOP[$fcvcount]}
tval=`cat ${tsens}`
if [ $? -ne 0 ]
then
echo "Error reading temperature from $DIR/$tsens"
restorefans
fi
tval=`echo ${tval} |cut -d' ' -f3 |cut -d'.' -f1`
if [ "$SYSFS" = "1" ]
then
let tval="$tval / 1000"
fi
pwmpval=`cat ${pwmo}`
if [ $? -ne 0 ]
then
echo "Error reading PWM value from $DIR/$pwmo"
restorefans
fi
pwmpval=`echo ${pwmpval} | cut -d' ' -f1`
|
to:
| Code: |
# main function
function UpdateFanSpeeds {
let fcvcount=0
while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
do
#hopefully shorter vars will improve readability:
pwmo=${AFCPWM[$fcvcount]}
tsens=${AFCTEMP[$fcvcount]}
fan=${AFCFAN[$fcvcount]}
mint=${AFCMINTEMP[$fcvcount]}
maxt=${AFCMAXTEMP[$fcvcount]}
minsa=${AFCMINSTART[$fcvcount]}
minso=${AFCMINSTOP[$fcvcount]}
tval=`cat /proc/acpi/thermal_zone/THRM/temperature`
if [ $? -ne 0 ]
then
echo "Error reading temperature from $DIR/$tsens"
restorefans
fi
tval=`echo ${tval} |cut -d' ' -f2 |cut -d'.' -f1`
pwmpval=`cat ${pwmo}`
if [ $? -ne 0 ]
then
echo "Error reading PWM value from $DIR/$pwmo"
restorefans
fi
pwmpval=`echo ${pwmpval} | cut -d' ' -f1`
|
PLS check your /proc/acpi, you may have something else instead of /proc/acpi/thermal_zone/THRM/temperature. This is valid for my ECS board.
- then use "pwmconfig" and generate valid /etc/fancontrol config file
- start /usr/sbin/acpifancontrol &
- enjoy the silence when idle and full fan speed when CPU is heavily crunching numbers 
This is quick and dirty hack, anyone fancy to do it more sane way? |
|
Unsupported Software
