Dell Laptop Fan Control

watch sensors

Linux

• http://askubuntu.com/questions/63588/how-do-i-get-fan-control-working

yaourt i8kutils

• Set to max:

i8kfan 2 2

• But right after you set it the bios puts it right back down? (Run the command fast in a row)

• To fix, we need smm

wget https://launchpad.net/i8kutils/trunk/1.42/+download/i8kutils_1.42.tar.xz
tar xvf i8kutils_1.42.tar.xz

• Build smm

cd i8kutils

• 64 bit:

gcc -g -O2 -Wall -I. -o smm -m32 smm.c

• 32 bit:

make

or

gcc -g -O2 -Wall -I. -o smm smm.c

same thing

• Disable BIOS Fan Speed Control:

sudo ./smm 30a3

• Enable BIOS Fan Speed Control:

sudo ./smm 31a3

Disable it and issue the command again!

i8kfan 2 2 (Listen as this will set fans to maximum speed)

i8kfan 1 1 (This will set fans to slow speed)

i8kfan
-1 0
(which means there is no left fan and the right fan is off)

i8kfan - 1
(turns the right fan on at the minimum level)

i8kfan - 2
(turns the right fan at the maximum level)

i8kfan - 0
(turns the right fan off)

Check temp using lm sensors

• http://www.cyberciti.biz/faq/howto-linux-get-sensors-information/