You need to do this by hand? The Linux kernel does all the PM stuff nowadays automatically afik. At least I didn't touch any of this settings for a long time a

You need to do this by hand? The Linux kernel does all the PM stuff nowadays automatically afik. At least I didn't touch any of this settings for a long time and it just works. When not compiling anything or something that like, but surfing, editing text (in something besides IDEA), watching videos, or such "light tasks" the computer has only a few percent CPU load at max, the fan is off, it has room temperature, and runs for hours on battery. I would also support what one of the siblings said: Explicitly pining the CPU to lower frequencies doesn't help much. For example web pages load much longer. I think a few hundred milliseconds at higher speed and then falling back into the idle mode doesn't cost much extra battery compared to up a few seconds of full CPU load at lower frequencies for a page load. Yes, it safes battery to make the CPU slow. But than doing anything with the computer is also much slower and everything takes "forever" therefore. I'm not sure this is a net win when the battery lasts longer but you waste much more time waiting. A super slow computer feels worse in the end, imho.