Stop RPi from triggering HDMI on TV while booting

[callmeseb]

I have bit annoying situation with RPi which is powered by USB from TV. When I'm turning on TV - RPi is booting - but it's triggering HDMI port making TV to set on HDMI which is connected to RPi. This behavior is bit annoying - as in most of the cases when I turn on TV - I'm not watching XBMC - but rather TV. How to turn on "silent start" without triggering HDMI?

I have as well Chromecast which behaves as expected - it's not triggering HDMI untill explicitly called. I'd love XBIAN behave this way as well. There has been number of topic on that forum - but I didn't find an answer - hence new thread.
S.