I wanted to ask if this is normal:
Cpu(s): 6.3%us, 0.9%sy, 0.0%ni, 92.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
I typed "top" and got this result, I realise that only 1-2 cores are really working...
And my laptop gets hot of course...
I had a similar problem, but it was related with the discrete nvidia video card: it was always on, which was warming the whole system. Did you check that issue?
Correct me if I'm wrong, but that 6% of processor use, can be due to the wrong use of your video card settings
If you have an nvidia card, you can check the documentation of the 'bumblebee' project here: https://wiki.ubuntu.com/Bumblebee
For other cards, check this link: http://linux-hybrid-graphics.blogspot.com/
Hope it helps!