Hi zeb!
I have no problems here. Although,... running this on Void...
Did you look at the man pages
https://linux.die.net/man/1/cpupower ?
Things like
are working just fine

Thx for the tip. This can be useful

EDIT: Tried to check on Peppermint, but the available linux-tools-common package using apt-cache search is for the 4.4 kernel, but I'm using the 4.14 kernel... Sorry, I can't be a better help

EDIT2: So, I've booted into the 4.4 kernel, installed the package and... I need more packages


Sorry, but I'm running 4.14 and don't need these packages right now... Have you tried installing all the required packages and running the command?