I recently installed Ubuntu 11.10 on my Samsung laptop.
On unity, I can't even know what graphics I have (in system settings). However, after I switched to gnome, I know can see my graphics: GeForce GT 330M/PCI/SSE2.
But my main issue remains: If I go under system settings -> displays, my display is listed as "unknown" and I can't detect my external display. During the ubuntu installation, my external screen worked (it was a clone of my laptops screen).
I tried to update my driver in system settings -> additional driver (yes, I then rebooted), I tried to update it manually within the console (sudo apt-get install nvidia-current), but still nothing.
EDIT: On another topic I've seen someone asking to run a ddcprobe to retreive more infos. Here is what I get:
mmap /dev/zero: Operation not permitted VESA BIOS Extensions not detected.