@ Andreas Wolf: yes, I checked again the Enhanced Display checkmark and in the bubble help it says that it uses 3D. I forgot about that.

@ bigfoot: wow, thanks for this detailed answer! When using Windows I don't have this problem of raising CPU time. The curve stays on the ground. So maybe Windows does it dirrently. Mouse is also connected through USB. Or it is because the i7 and integrated Intel graphics is much more powerful.