Here it goes,

I have a laptop with an Nvidia GT520M card and I am running ubuntu 11.10. When I first installed ubuntu on my pc, I was able to use gnome3 and all was well (I suppose my laptop was using the intel card instead of the Nvidia one).

Because I wanted to develop some things in CUDA from my own machine, I started to look around on what I could do, so that I could use the discrete card just for CUDA and leave the other one to handle gnome. By installing nvidia's current drivers and bumblebee, I am now able to run programs in CUDA using optirun but my machine uses the simple version of gnome, without any effects whatsoever. Of course, when I removed nvidia's drivers, optirun couldn't run CUDA programs and stopped with :

[ERROR]Cannot access secondary GPU - error: [XORG] (EE) Failed to load module "nouveau" (module does not exist, 0)

Is there something I can do so that I can have both worlds?