Maybe some more details:
- nvtv tells me there's "no supported card"
- yanc tells me sometimes "twinview options are disabled" but even when it doesn't I still can't change the twinview options
- I got ONCE everything OK and could get my desktop displayed on tv. One log out and nothing worked again
- I get the following rather interesting warnings in /var/log /Xfree86.0.log:
(WW) NVIDIA(0): 3 display devices connected, but only 2 supported;
(WW) NVIDIA(0): adjusting...
( I only have a flat panel and the tv thru a composite cabel and a scart connector. I googled around and all I found was the same warning with 2 display... 1 supported, so that seems to be rather unique!)
(II) NVIDIA(0): Connected display device(s): CRT-0, CRT-1, TV-0
(**) NVIDIA(0): TwinView enabled
(it seems to be enabled. Even a decoder is found
(--) NVIDIA(0): Detected TV Encoder: NVIDIA
Hope that helps a little...