HDMI port not detected

Hi, I use Debian Wheezy in a ASUS N53JF with a nVidia GT 425m. In order to use the graphics acceleration I installed bumblebee (http://suwako.nomanga.net/). Even before installing bumblebee the HDMI port was not working. This is the xrandr output:

http://paste.debian.net/173225/

Any help to make it work will be very appreciated. Thank you in advance.