fan: Add fan-off hysteresis value - Githubissues

system76 / ec

System76 Open Source Embedded Controller

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fan: Add fan-off hysteresis value #460

Closed crawfxrd closed 3 months ago

crawfxrd commented 3 months ago

Add a hysteresis for fan-off to prevent fans from constantly starting/stopping when the system temperature hovers at the minimum fan table value.

Note: 2°C was arbitrarily chosen.

TODO:

Track when it cooling to know when to apply hyteresis

Test:

Configure fan points to start near temperature when system is idle, I guess
Observe frequency of fans starting and stopping

Ref: https://github.com/system76/firmware-open/issues/250