I have been using xubuntu 13.04 for while but only recently had the need to use HDMI.
When I connect my machine to a TV, the TV indicates that there is no signal. ALSA indicates that there is a HDMI output. I have also tried using a displayport but still no change.
Then I tried using xubuntu from a live boot disc and then HDMI worked, so what could be the problem?
I am running Intel core i5 with integrated HD3000 graphics and a Nvidia 525M with bumblebee.