I know. I was just trying to figure if that could be causing the TV to turn off or lose sync or something. Where as straight DVI with no adapter might be more natural. I dunno.
Can you try older VGA? My HD STB would seem to lose sync sometimes and blank my TV out until I switched it back to regular Component and it's worked much better.
Another thing it could be is some weird HDCP issue. Maybe try a firmware update for your TV.