Why do ubuntu and windows load the cpu differently?

Question

linux

The laptop has 2 operating systems installed: Windows 10 and Ubuntu.
I immediately noticed that on Ubuntu the laptop starts to make noise after starting (the noise in my case is an indicator that the percent is loading) and the battery holds a charge 2 times less. In the system monitor I look: at idle 70% is stable.
On Windows, it always makes noise justifiably, "on business" (when I compile a program, or a hundred of tabs and applications are open).
I'm using Ubuntu for educational purposes. What could be the reason? Here it's not even about the CPU load numbers, but about working at the laptop - elementary discomfort arises.

UPD (05/04/20): I carefully read all your answers, tinkered for 3 hours (to no avail) and left this problem on "until it itchs". Today I updated bubuntu to the new version 20.04 LTS and... there is no problem! In a simple CPU is loaded to a minimum, the cooler is silent.

Answer 1

to "calm down the cooler" you need to install/configure
lm-sensors+fancontrol
why is your CPU loaded at 70% ??? - look at the system monitor, what exactly is loading the percent.

Answer 2

In the system monitor I look: at idle 70% is stable.

What exactly is loading the system?
Linux has an exceptionally poor power management subsystem, here you either turn on aggressive power saving (google: cpufreq) or return to a full-fledged desktop OS that will support the laptop normally.

Answer 3

You can install an aggressive power saving utility:
sudo apt install tlp && sudo tlp start

Answer 4

In the system monitor I look: at idle 70% is stable.

So it is necessary to find out the reasons why it loads so much. It shouldn't be like that. Eliminate the root cause (the load on the percent), and there the valves will stop spinning like crazy.

Answer 5

Because the optimization is different. Hardware/driver manufacturers are paying more attention to the more common OS, which is logical. In Linux, due to the large number of distributions, it is difficult to optimize for each. Therefore, all this falls on the shoulders of the maintainer or the user himself. Some drivers are not written at all by the manufacturer, but by members of the community.
Therefore, out of the box, Linux on specific equipment works more "wastefully" in terms of battery life. But if you "slick" (optimize) it, it will work approximately like windows.

Answer 6

I also have win10 and ubuntu. On Ubuntu, the workload of the processor is 5-15%. What is loading your percent. I don't think it's a matter of ubuntu. See what process loads and deal with it. I have a Coreduo Note 2007. Ubuntu, in comparison with Windows, according to the subjective opinion, is 2 times faster.

Answer 7

Once again, it is confirmed that Linux is a system for finishing. The number of laptops and their performance have more than paid off their cost for a long time, and Linux is still marking time.
But I myself am also sitting on Linux: 3 laptops, energy saving is normal

Answer 8

Who installed Ubuntu? I put a Mini with a synamon on my laptop, everything works perfectly, the cooler turns on to the full only under load ... Moreover, the power management is regular, when running on battery, the brightness is dimmed, etc. ...