Arch Linux

Ploppz

Member

Registered: 2013-09-14

Posts: 313

Can't make fan control work.

I am trying to control my fans to run with a slower speed, but none of my attempts make a difference.

$ sudo pwmconfig

Found the following devices:
   hwmon0/device is k10temp
   hwmon1/device is fam15h_power
   hwmon2 is radeon
   hwmon3/device is it8720

Found the following PWM controls:
   hwmon3/device/pwm1           current value: 254

$ fancontrol

Loading configuration from /etc/fancontrol ...

Common settings:
  INTERVAL=5

Settings for hwmon3/device/pwm1:
  Depends on hwmon3/device/temp3_input
  Controls hwmon3/device/fan1_input
  MINTEMP=20
  MAXTEMP=60
  MINSTART=150
  MINSTOP=100
  MINPWM=0
  MAXPWM=255

Error: file hwmon3/device/pwm1 doesn't exist

At least one referenced file is missing. Either some required kernel
modules haven't been loaded, or your configuration file is outdated.
In the latter case, you should run pwmconfig again.

I find it highly suspicious that it first says "Found the following PWM controls: hwmon3/device/pwm1", and then (in fancontrol) it says "Error: file hwmon3/device/pwm1 doesn't exist".

I went through pwmconfig mostly accepting default values, here is /etc/fancontrol:

# Configuration file generated by pwmconfig, changes will be lost
INTERVAL=5
DEVPATH=hwmon3=devices/platform/it87.552
DEVNAME=hwmon3=it8720
FCTEMPS= hwmon3/device/pwm1=hwmon3/device/temp3_input
FCFANS= hwmon3/device/pwm1=hwmon3/device/fan1_input
MINTEMP= hwmon3/device/pwm1=20
MAXTEMP= hwmon3/device/pwm1=60
MINSTART= hwmon3/device/pwm1=150
MINSTOP= hwmon3/device/pwm1=100

None of this made the fans go any slower, here is sensors:
(Look at fan1, fan3 and fan5)

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +21.2°C  (high = +70.0°C)
                       (crit = +90.0°C, hyst = +87.0°C)

fam15h_power-pci-00c4
Adapter: PCI adapter
power1:       36.52 W  (crit = 124.95 W)

radeon-pci-0100
Adapter: PCI adapter
temp1:        +32.0°C  (crit = +120.0°C, hyst = +90.0°C)

it8720-isa-0228
Adapter: ISA adapter
in0:          +0.91 V  (min =  +0.00 V, max =  +4.08 V)
in1:          +1.49 V  (min =  +0.00 V, max =  +4.08 V)
in2:          +3.34 V  (min =  +0.00 V, max =  +4.08 V)
+5V:          +2.99 V  (min =  +0.00 V, max =  +4.08 V)
in4:          +3.14 V  (min =  +0.00 V, max =  +4.08 V)
in5:          +0.78 V  (min =  +0.00 V, max =  +4.08 V)
in6:          +4.08 V  (min =  +0.00 V, max =  +4.08 V)
5VSB:         +2.94 V  (min =  +0.00 V, max =  +4.08 V)
Vbat:         +3.07 V  
fan1:        1057 RPM  (min =    0 RPM)
fan2:           0 RPM  (min =    0 RPM)
fan3:        1280 RPM  (min =    0 RPM)
fan5:        1280 RPM  (min =    0 RPM)
temp1:        +34.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp2:        +30.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermal diode
temp3:        +37.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = Intel PECI
intrusion0:  ALARM

The fans I have are one Nuctua cpu cooler which did stop during pwmconfig, and two Fractal Design R2 120mm, which didn't seem to be affected by pwmconfig. They are not PWM. Is it required that the fans are PWM anyway? I consider buying new case fans, if so, should I strictly (considering controllability in linux) buy PWM ones?

Last edited by Ploppz (2014-04-26 17:03:11)

beta990

Member

Registered: 2011-07-10

Posts: 207

Re: Can't make fan control work.

I don't think this helps, but fan (control) only works when plugged into the PWM/Case-fan on the MB. It doesn't work otherwise.

Ploppz

Member

Registered: 2013-09-14

Posts: 313

Re: Can't make fan control work.

So maybe I should buy new case fans which are PWM (at least they have "PWM" in the title). Is it guaranteed that 4-pin PWM fans will be controllable?
Also, the front fan was plugged into "PWR_FAN", and the rear one was plugged into "SYS_FAN2".

Last edited by Ploppz (2014-04-28 13:21:41)