I've currently made a new switch over from 12.04 to 13.10 due to my love for the gnome 3 desktop and 12.04 were breaking Gnome 3 each time.
However 13.10 detects my Intel Ivy Bridge and will use it instead of my Nvidia, which is fair enough, however I have installed Nvidia-331 drivers with Optimus and installed Bumblebee UI in order to apply Nvidia to certain applications.
However back in my 12.04 I was able to play games like Left 4 Dead 2 with maxed out settings with a smooth and stable FPS, however now, Left 4 Dead 2 will jump with FPS spikes every second. Therefore pointing to the fact the Nvidia drivers might not be even activating!
I'm willing to start my driver installation from scratch and i've seen a lot of tutorials already out there, but am cautious of testing them out due to personal experience of graphics drivers being the end of my Ubuntu installation!
Question being has anybody got something close to this working? With smooth FPS in most gaming applications? If so please tell me how you did it!