Fan speed goes full power briefly when I turn it off.

[freed00m]

Hi,

 

I want to ask, if there's a way how to turn off Helios64 without the 100% fan spin.

It only takes 1 second but it's very annoying when I want to turn it off during the night.

 

 

Looking https://github.com/armbian/build/blob/master/packages/bsp/helios64/fancontrol.conf

and https://wiki.kobol.io/helios64/pwm/

 

No luck :Z

[allen--smithee]

Hi @freed00m

I think you would like to read  /usr/sbin/fancontrol.

[gprovost]

in /usr/sbin/fancontrol you can comment the lines 517 & 518 to achieve what you want.

 

#trap 'restorefans 0' SIGQUIT SIGTERM
#trap 'restorefans 1' SIGHUP SIGINT

 

You will need to stop and restart the service in order for it to take effect

 

systemctl restart fancontrol.service 

 

 

[freed00m]

@gprovost - Thx that indeed acomplish what I want.

 

Question, what purpose does it serve? Making loud halting seems like a unwanted behavior.

Also what side effects can I expect?

 

the script is at /usr/sbin/fancontrol .

 

[Heisath]

I assume the original thinking of the authors of fancontrol was, that when the programm crashes/unexpectedly get closed, it does not leave the fans at a low speed and possibly endanger the system. 

The fancontrol does not differentiate between shutdown and exit / kill.

 

And from a system perspective it is much better to have annoying loud fans (but a cool and healthy system) than slowly burning away components while no sound is heard

 

I guess that also answers your second question, if you comment those lines away, the fans wont auto speed up if fancontrol crashes or similar.

[allen--smithee]

Line 44 MAX = 255

You will probably want to change this value to your own.

 

nevertheless, I will not advise you not to go below 120, for the obvious reasons cited by @Heisath .

 

If it's still too noisy. you can safely reduce this value (> 35) after modifying the thermal Pad between the board and the heat sink.

 

 

 

 

[freed00m]

@allen--smithee Thx for the mod tip, I'll do it when I move and have more time.

 

For the time being I will writte myself a systemd service that apply patch (uncomment the script's traps) and when need for quite termintion, I will comment out the lines to have quite halt).