after you put the 'nv' back to 'nvidia' use this page:
This will show you the numbers to press to get the appropriate input.
One thing to note with NVIDIA cards that have BOTH a DVI and a VGA output... The NVIDIA driver TREATS the DVI port as the first VGA port.. so if you need to, attach a DVI to VGA dongle to it, and connect your VGA connector there.
note to all others: please dear god, unless your card is definitely not supported by the vendor driver, DO NOT MESS WITH THE VIDEO SETTINGS UNLESS YOU KNOW WHAT YOU ARE DOING! THE SYSTEM TAKES CARE OF THIS ITSELF. There are exceptions to this, and they are detailed in the wiki.