I have an Asus laptop with a core i3 processor, 4GB memory and an NVidia 540M graphics card, as well as an Intel graphics card.
I have just installed Ubuntu 13.04 and it is lagging. By lagging I mean being non-responsive for a few seconds even while i'm using the terminal. I have tried updating the drivers via apt-get but it did not do the trick.
Is Ubuntu using the second Intel graphic card and that is why the update did not help?