@ph0ton said in Improving power consumption on Nuc 11 pro:

I have never come a across a machine in the past 15 years how had problems with C-states, unless it was related to instabilities in the BIOS / UEFI bios.

I have now reactivate (because I cannot exclude that maybe something else has caused the shutdowns - at that time I made also some changes regarding the USB-Ports and the update from 2.5.2 -> 2.6.0) the setting: hw.acpi.cpu.cx_lowest=C3 (it sets automatic the dev.cpu.0/1.cx_lowest to C3)
and I keep a eye on it and will give feedback if something happends ... 🤔

Result:
dev.cpu.0.cx_usage: 30.82% 69.17% 0.00% last 637us
dev.cpu.1.cx_usage: 59.30% 13.53% 27.15% last 267us

Interesting: dev.cpu.0 never go to C3 😏

Edit 09.05.23: After rebooting the system dev.cpu.0 is going also to C3:
dev.cpu.0.cx_usage: 62.51% 7.06% 30.42% last 1250us

Regards,
fireodo