Ubuntu 10.04: Fan speed

My CPU fan always keep high speed all the time. I use pwmconfig to control it. Now,it works fine with my Gateway PC. But I have to modify /etc/fancontrol even the changes may be lost,because I don't know where to set MINSTART and MINSTOP by running pwmconfig...:-(

Here's the /etc/fancontrol:
$ cat /etc/fancontrol
# Configuration file generated by pwmconfig, changes will be lost
INTERVAL=10
DEVPATH=hwmon2=devices/platform/it87.2576
DEVNAME=hwmon2=it8720
FCTEMPS= hwmon2/device/pwm1=hwmon2/device/temp1_input
FCFANS= hwmon2/device/pwm1=hwmon2/device/fan1_input
MINTEMP= hwmon2/device/pwm1=20
MAXTEMP= hwmon2/device/pwm1=60
MINSTART= hwmon2/device/pwm1=50
MINSTOP= hwmon2/device/pwm1=0
MAXPWM= hwmon2/device/pwm1=120

Now, the CPU fan running on 983 RPM. That's very nice and no noise anymore!!!!

$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Core 0:      +35.0°C  (high = +76.0°C, crit = +100.0°C)  

coretemp-isa-0001
Adapter: ISA adapter
Core 1:      +27.0°C  (high = +76.0°C, crit = +100.0°C)  

it8720-isa-0a10
Adapter: ISA adapter
in0:         +1.09 V  (min =  +0.00 V, max =  +4.08 V)   
in1:         +2.99 V  (min =  +0.00 V, max =  +4.08 V)   
in2:         +1.52 V  (min =  +0.00 V, max =  +4.08 V)   
in3:         +2.98 V  (min =  +0.00 V, max =  +4.08 V)   
in4:         +3.02 V  (min =  +0.00 V, max =  +4.08 V)   
in5:         +1.14 V  (min =  +0.00 V, max =  +4.08 V)   
in6:         +3.41 V  (min =  +0.00 V, max =  +4.08 V)   
in7:         +2.98 V  (min =  +0.00 V, max =  +4.08 V)   
Vbat:        +3.15 V
fan1:        983 RPM  (min =    0 RPM)
fan2:          0 RPM  (min =    0 RPM)
fan3:          0 RPM  (min =    0 RPM)
temp1:       +33.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = thermal diode
temp2:       +29.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = thermistor
temp3:       +24.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = thermal diode
cpu0_vid:   +0.000 V


So far, no issue....