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‎03-31-2020 03:54 PM - edited ‎03-31-2020 04:02 PM

HP Recommended

I think I figured it out.  This generation uses Intel ME (Management Engine) for fan control instead of direct control.  Interesting especially with ME's recent vulnerability scares.  Thread here:
http://www.kameli.net/marq/?page_id=4263

The component of ME that manages this is called Intel QST (Quiet System Technology) and must be controlled by the OS indirectly.  There is a Linux driver I'm experimenting with. Thread here: https://unix.stackexchange.com/questions/477107/what-is-the-state-of-linux-kernel-support-for-intel-...

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