This page lists the 120 but not the 140, but may be of help. Note it refers to some quite dated distros so may be irrelevant:

https://www.thinkwiki.org/wiki/How_to_control_fan_speed#Automated_program_-_Simple_ThinkPad_Fan_Control



On Tue, Jul 2, 2019 at 1:44 PM Robert Moskowitz <rgm@htt-consult.com> wrote:
Anyone have experience with this?

My new x140e's fan is running at 590rpm with the CPU/GPU temp at low 50s
C.  I have a SSD, so drive temp is not much of an issue.

The fan is noisy.  The old x120e ran at 450rpm with temp of 60s C and
was just fine.

I am going through the various docs and samples, but have yet to figure
out what to do.  The fan variables for the x140 look to be the same as
the x120.

thanks for any help

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