I have a Dell Precision 7550 with an Intel Xeon W-10885M (Comet Lake), and sometimes, on Ubuntu only (not on Windows), my CPU get stuck at 800Mhz when plugged in (no problem on battery). I'm trying to understand what happens, and what triggers this behaviour.
QUESTION: What are all the bits/registers I could try with readmsr to read to understand what happens or what was triggered? How to read them correctly? How to interpret them correctly?
Note: It's unlikely to be a temperature problem, because I checked the temperature with lm-sensors and everything seems fine. I'm looking for the signal/trigger to at least understand where it's coming from.
