Arch Linux

BlackCap

Member

Registered: 2015-05-18

Posts: 1

My fan is pulsing on and off

Once my CPU get up to 60°C my CPU fan turns on until it gets down to 45-ish, which takes about 20 seconds. Then it turns off all together for 2 minutes until reaches 60°C again, at which point the cycle repeats. Is this normal behavior? Can I tell it to like.. run at 10% speed so that it keep itself cool rather than pulsing on at full speed once it reaches a certain temperature?

This is the output of the "sensors" command

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +50.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +50.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +44.0°C  (high = +87.0°C, crit = +105.0°C)

According to what I've read, it is supposed to list my fan and it's voltage..

Update:
According to the arch wiki on fan speed control, I should be able to read the current fan speed in "/sys/class/hwmon/hwmon0/device/fan1_input", however, that file does not exist.

$ ls /sys/class/hwmon/hwmon0/
device  power      temp1_crit        temp1_input  temp1_max   temp2_crit_alarm  temp2_label  temp3_crit        temp3_input  temp3_max
name    subsystem  temp1_crit_alarm  temp1_label  temp2_crit  temp2_input       temp2_max    temp3_crit_alarm  temp3_label  uevent
$ ls /sys/class/hwmon/hwmon0/device
driver  driver_override  hwmon  modalias  power  subsystem  uevent
$ ls /sys/class/hwmon/hwmon0/device/hwmon/
hwmon0
$ ls /sys/class/hwmon/hwmon0/device/hwmon/hwmon0/
device  power      temp1_crit        temp1_input  temp1_max   temp2_crit_alarm  temp2_label  temp3_crit        temp3_input  temp3_max
name    subsystem  temp1_crit_alarm  temp1_label  temp2_crit  temp2_input       temp2_max    temp3_crit_alarm  temp3_label  uevent

Last edited by BlackCap (2015-05-18 12:51:04)