Comment # 3 on bug 903520 from Mike Komarovsky

(In reply to Jean Delvare from comment #1)
> Did the problem happen immediately (fancontrol never worked) or only after
> rebooting?
> 
> Please stop the fancontrol service and run fancontrol manually as root with
> debugging enabled:
> 
> # DEBUG=1 fancontrol
> 
> Then report the output.

It happen right after fancontrol service start, here is output with DEBUG
uncommented:

Loading configuration from /etc/fancontrol ...

Common settings:
  INTERVAL=10

Settings for hwmon3/device/pwm2:
  Depends on hwmon2/device/temp1_input
  Controls 
  MINTEMP=40
  MAXTEMP=65
  MINSTART=128
  MINSTOP=57
  MINPWM=0
  MAXPWM=255

Enabling PWM on fans...
Starting automatic fan control...
pwmo=hwmon3/device/pwm2
tsens=hwmon2/device/temp1_input
fan=
mint=40000
maxt=65000
minsa=128
minso=57
minpwm=0
maxpwm=255
tval=46375
pwmpval=255
fanval=1
min_fanval=
/usr/sbin/fancontrol: line 481: [: too many arguments
new pwmval=107
pwmo=hwmon3/device/pwm2
tsens=hwmon2/device/temp1_input
fan=
mint=40000
maxt=65000
minsa=128
minso=57
minpwm=0
maxpwm=255
tval=46375
pwmpval=107
fanval=1
min_fanval=
/usr/sbin/fancontrol: line 481: [: too many arguments
new pwmval=107
pwmo=hwmon3/device/pwm2
tsens=hwmon2/device/temp1_input
fan=
mint=40000
maxt=65000
minsa=128
minso=57
minpwm=0
maxpwm=255
tval=46500
pwmpval=107
fanval=1
min_fanval=
/usr/sbin/fancontrol: line 481: [: too many arguments
new pwmval=108
^C