Was Mate desktop, ten caja instances. Now Nouveau

[Roger]

<snip>  After that I tried to upgrade from nouveau to NVIDIA drivers.
</snip>
Why?
I have used the nouveau drivers since Fedora 16 they work very well and 
it saved me a lot of heartache and time. I use mate on one system, Gnome 
on another and cinnamon on the desktop.
I do graphic intensive work and development at the same time.
  Cinnamon desktop is getting jerky when dragging windows when I have 
several open but apart from that I'm glad to stick with Nouveau and 
support the devs.
Roger