Power consumption check / kernel differences ?

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Are there any commands to show information that could tell me about the level of power consumption ? E.g.: energy saving state of CPU or the like ?


On the SBC i am using, i think the power consumption is lower when running the same setup with kernel 5.4, and higher with legacy kernel 4.4. Alas, 5.4 has other problems, so i want to try to figure out what settings/features reduce power consumption in 5.4 and maybe i can then configure them equally in 4.4.


This is rockpi4a rockchip3399. If there is nothing generic enough about the topic, i can ask on the forum for that chip.

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