PowerTop
https://github.com/fenrus75/powertop
https://access.redhat.com/documentation/ko-kr/red_hat_enterprise_linux/6/html/power_management_guide/powertop
https://wiki.archlinux.org/index.php/Powertop
https://idchowto.com/?p=32077
Dell XPS 13 (9370) 2018