Unfortunately there are a lot of us out here with the Samsung X10 who all have the same problem (try searching for Samsung X10 on this forum). The problem seems to be with the laptop's built in LCD --- it seems like it is not being detected properly by the NVidia driver. On mine I can get the NVidia driver to work when an external monitor is connected to the SVGA out. I haven't tried TVout.
NVidia say they are looking into the problem so I think all we can do is keep reminding them about it!