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I'm running Ubuntu 20.04 on an older Dell laptop, and recently, I noticed that it has been getting very hot. I tried running sudo pwmconfig, the output of which was;

Found the following fan sensors:
hwmon5/fan1_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.

I am not sure if the fan works, nor how to start it and that is what I need to know.

puma
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  • Nothing to do with Ubuntu, but something like that? https://www.dell.com/support/home/en-us/quicktest – ob2 Aug 16 '21 at 16:17
  • First take a look into your bios/Uefi if there is a point for this. Maybe http://manpages.ubuntu.com/manpages/precise/man1/i8kmon.1.html this is helpfull (as far I understand it is for dell lapptops) – nobody Aug 16 '21 at 16:21
  • i8kutils is probably the way to go with a Dell https://askubuntu.com/questions/1094485/dell-xps-15-9570-how-to-control-the-fans/1094617#1094617 – rtaft Sep 23 '21 at 14:02

1 Answers1

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I do not know how to start the fans - I even doubt that this is possible - but I know how you can query them:

Install the ipmi tools:

sudo apt-get install freeipmi

Then query all sensors:

sudo ipmi-sensors | grep FAN

which will give me on my system the installed fans with the rpm.

thomas
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