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A fresh 18.04 Ubuntu install on a Windows Surface Book 2 dual-booting Windows 10. The kworker/0:0+kac process never goes below 80% CPU.

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I tried this Why does kworker cpu usage get so high? but I don't have any interrupts above 10, and when I disabled those ones it fixed nothing.

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The Microsoft Surface devices need a custom kernel to work with Linux (includes Battery Indicator, Touch, Pen, etc. ). Following the guide at https://github.com/linux-surface/linux-surface fixed the problem for me.

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