u-boot display mode

As you may have notice from my previous emails I'm trying to get
beagleboard output something to an le32r86 hdtv, with no success.
The only think I can display is the u-boot (or x-loader) splash
screen. The one with the beagle.
That is working so at least the cable is working and the beagleboard
output is working, for sure.

I wonder what is that display mode, maybe I can try that with angstrom
as any other mode fails.
What's the exact kernel option for DSS2 to enable that display mode?