<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