controlling cpu fan

[morgon]

Hi,

I am trying to set up fancontrol, but I have a problem:

I have set up lm_sensors and this is the output when I run sensors:

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/home/mh > sensors
atk0110-acpi-0
Adapter: ACPI interface
Vcore Voltage:      +1.26 V  (min =  +0.85 V, max =  +1.60 V)
 +3.3 Voltage:      +3.34 V  (min =  +2.97 V, max =  +3.63 V)
 +5 Voltage:        +4.97 V  (min =  +4.50 V, max =  +5.50 V)
 +12 Voltage:      +12.09 V  (min = +10.20 V, max = +13.80 V)
CPU FAN Speed:        0 RPM  (min =  600 RPM, max = 7200 RPM)
CHASSIS FAN Speed:    0 RPM  (min =  600 RPM, max = 7200 RPM)
POWER FAN Speed:   61363 RPM  (min =  600 RPM, max = 7200 RPM)
CPU Temperature:    +32.0°C  (high = +60.0°C, crit = +95.0°C)
MB Temperature:     +31.0°C  (high = +45.0°C, crit = +75.0°C)

it8712-isa-0290
Adapter: ISA adapter
in0:          +1.26 V  (min =  +0.00 V, max =  +4.08 V)
in1:          +4.08 V  (min =  +0.00 V, max =  +4.08 V)  ALARM
in2:          +3.34 V  (min =  +0.00 V, max =  +4.08 V)
+5V:          +4.08 V  (min =  +0.00 V, max =  +4.08 V)  ALARM
in4:          +3.18 V  (min =  +0.00 V, max =  +4.08 V)
in5:          +1.55 V  (min =  +0.00 V, max =  +4.08 V)
in6:          +4.08 V  (min =  +0.00 V, max =  +4.08 V)  ALARM
5VSB:         +4.08 V  (min =  +0.00 V, max =  +4.08 V)  ALARM
Vbat:         +3.36 V  
fan1:           0 RPM  (min =    0 RPM)
fan2:           0 RPM  (min =    0 RPM)
fan3:        37500 RPM  (min =    0 RPM)
temp1:        +32.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = thermistor
temp2:        +31.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = thermistor
temp3:       -128.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = disabled
cpu0_vid:    +1.550 V
intrusion0:  OK

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +19.5°C  (high = +70.0°C)
                       (crit = +99.5°C, hyst = +94.5°C)

Notice that there is a reading for fan3.

Now when I run pwmconfig it goes through it's motions and succeeds in making the fan run at full speed, however at the end I get:

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Giving the fans some time to reach full speed...
Found the following fan sensors:
   hwmon0/fan1_input     current speed: 0 ... skipping!
   hwmon0/fan2_input     current speed: 0 ... skipping!
   hwmon0/fan3_input     current speed: 0 ... skipping!
   hwmon2/fan1_input     current speed: 0 ... skipping!
   hwmon2/fan2_input     current speed: 0 ... skipping!
   hwmon2/fan3_input     current speed: 0 ... skipping!

There are no working fan sensors, all readings are 0.
Make sure you have a 3-wire fan connected.
You may also need to increase the fan divisors.
See doc/fan-divisors for more information.

And then the fan keeps running at full speed until I reboot.

What could this problem be?
I've just checked that the fan is indeed connected to the mainboard.

Many thanks!

[arzgi]

Have you enabled fan control in BIOS/UEFI?

[morgon]

There is evidently no "fan control" setting as such in my BIOS.
I have however tried several options, all to no avail.

However as I mentioned, running ppwmconfig increases the fan speed, so that (in my understanding) shows that it is possible to control the fan speed via software in principle.

[arzgi]

That bios setting can something like Cool & quiet (in mine), or something else. Software can't do things hw does not support.

[morgon]

Sorry, I don't understand.

As mentioned running software (ppwmconfig) changes the fan speed.

Is that not enough to prove that the BIOS is not in the way?

[arzgi]

Sorry, I was going wrong way.

[debiman]

As mentioned running software (ppwmconfig) changes the fan speed.

Is that not enough to prove that the BIOS is not in the way?

not necessarily.

[morgon]

And what does that mean?

How is that supposed to help me?

You seem to go through all the forum posting blah-blah...