I am a Ubuntu fan from a long time (since 7.04), and recently I bought and Asus 1215N with Nvidia Optimus ION (... no comments here ....) with an Atom processor Dual Core to replace my Msi Wind U100 that became old.

But, with the use, I've noticed that Ubuntu, 10.10, 11.04 and even 11.10, is slower on my Asus 1215N that on my Msi Wind U100..

I use Ubuntu like a charm on my Msi Wind U100, I can multitask, an using an operating system like Ubuntu is a very pleasent task, because Windows is extremly slow on this computer. I dind't noticed no lag or something like that on my Msi Wind, even with 10tabs on Google Chrome, Eclipse open, Updating the system and more.

But in my Asus 1215N, with 2GB of ram and an Atom Dual Core 1.8Ghz (the msi wind u100 is an Atom Single Core 1.6Ghz) Ubuntu, is barely unusable, Nautilus, Update Manager, Chrome, Eclipse and others take ages to start, and if I have 2 applications open (like terminal and gedit (I am not kidding)), It becames so slow that I can't used it correctly.

Important Information (Configuration of Booth the Computers) :
- Ubuntu 11.10
- Unity 3D
- 2GB of Ram

Windows 7 works better in Asus 1215N
And Arch Linux with gnome3 or kde4 works better on my Asus 1215N that Ubuntu.

Is this normal (I think not, but maybe there is an explanation, like the dual core of the Atom porely used) ?

And how can I solve this ? (Unity-2D works at the same speed or worse).