Re: nVidia, TVOut via Framebuffer - all without X
Of all the drivers you mentioned you can only get tvout when you use nvidia's drivers in combination with X. The other way to get tvout is to connect only a tv to a videocard and then boot the system. I don't think a framebuffer driver will work correctly with it.
Further note that the 'tvout at boot' way only works if you boot from the primary videocard. Other videocards aren't started at system startup, to initialize those you most likely need X.