I have the same problem and the Gnome 3 eats a lot of my CPU reducing the performance.
My machine: Ubuntu 18.04 Vostro 3500 Intel Core i5 540m NVidia GT-310m
I have the same problem and the Gnome 3 eats a lot of my CPU reducing the performance.
My machine:
Ubuntu 18.04
Vostro 3500
Intel Core i5 540m
NVidia GT-310m