cbaabc
n00b
Joined: 06 Aug 2010
Posts: 7
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 Posted: Tue Nov 23, 2010 12:30 am Post subject: fancontrol for applesmc on macbook pro 7.1 (mid 2010) |
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Hello,
I have a problem with my fancontrols on my macbook pro. The fan increases its speed not until the cpu temp gets really high(>70°C). The applesmc module seems to hold the fan at the minimum of 2000 rpm for most of the time. I try to solve this with a script, which raises the minimum speed if the temperature is rising.
The fan can take 2000-6200 rpm, but I raise the minimum from 2000 (<=50°C) up to 5000 (>=80°C) and leave the rest as it is, so that the automatic temperature control still works for higher temperatures.
My question now is: is my solution good enough or could this harm more than it helps?
And maybe someone can look over the script, as i havn't any experience with this.
The script:
| Code: | #!/bin/bash
# AUTOMATIC VALUES BELOW, DON`T EDIT
# FAN SPEED
FAN1_SPEED_MIN=2000
FAN1_SPEED_MAX=5000
# dynamic values
while [ 1 ]; do
# CPU TEMPS
CPU_TEMP0=`cat /sys/devices/platform/coretemp.0/temp1_input`
CPU_TEMP1=`cat /sys/devices/platform/coretemp.1/temp1_input`
CPU_TEMP=`expr "(" $CPU_TEMP0 + $CPU_TEMP1 ")" "/" 2000`
# calculate
FAN_SPEED=`expr "(" $CPU_TEMP "-" 30 ")" "*" 100`
# don`t go below min limit
if [ "$FAN_SPEED" -le "$FAN1_SPEED_MIN" ]; then
FAN_SPEED=$FAN1_SPEED_MIN;
fi
# don`t go above max limit
if [ "$FAN_SPEED" -gt "$FAN1_SPEED_MAX" ]; then
FAN_SPEED=$FAN1_SPEED_MAX;
fi
# only write if speed has changed
if [ "$FAN_SPEED" != "$FAN_SPEED_OLD" ]; then
#echo $CPU_TEMP $FAN_SPEED
echo $FAN_SPEED > /sys/devices/platform/applesmc.768/fan1_min
fi
# store old speed
FAN_SPEED_OLD=$FAN_SPEED;
sleep 15
done |
EDIT: I don't know if any other information could help, but i will provide them if necessary. |
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Kernel & Hardware
