Is there an open source software to control power and fan speed in a laptop?

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  • FanCtrl

    FanCtrl is a software that allows you to automatically control the fan speed on your PC.

  • Check out: https://github.com/lich426/FanCtrl

  • auto-cpufreq

    Automatic CPU speed & power optimizer for Linux

  • I know you didn't specifically ask for it, but there's https://github.com/AdnanHodzic/auto-cpufreq, which reduces power usage if it's not needed. Especially helpful for laptops. If would lead to fans running less if it's not needed, if I understand it correctly

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