Turn off screen when attached to a TV via HDMI

[Guest mancity12]

Is there any way to do this?

I was streaming a video attached to the TV in my house yesterday, but the screen wouldn't go off... I had to watch the TV, with the Vega upside down as it was also showing the picture! :D

[Guest PurpleRob]

This is What you are looking for, it was developed by one of our modaco community.

Its called backlight killer.

http://code.google.com/p/ptbw-codespace/downloads/list