The laptop gets very hot on Ubuntu, what could be the reason?

Question

ubuntu

I installed Ubuntu on a laptop with pre-installed Windows (Fujitsu Lifebook LH532) in a dual boot. Ubuntu works fast, but the laptop gets very hot, a couple of times it even crashed due to overheating (when android studio and chrome were working). Dust cleaned a month ago.
Advise, pliz, what can be done or in what direction to dig?
Ps Graphics cards -
1) Intel Corporation 3rd Gen Core
2) NVIDIA Corporation GF108M [GeForce GT 620M]

Answer 1

Perhaps the NVIDIA card works all the time, even when it's not needed and Intel is using it.
Maybe you should google in the direction of Optimus to turn off / turn on the discrete only when it is needed?

Answer 2

And what on Windows is not heated or what?