I realise this is an issue that has been covered a lot, one way or another, but at least from what I've been able to find, most of the discussion centres around getting HDMI audio to work. However, I have problems even getting the video to work from my laptop's HDMI output.
I have an HP dv6z-se, with an ATI Mobility Radeon HD 6550 (1 Gb) video card and using F14/KDE. My problem is that when I go to System Settings/Display/Monitor, Fedora doesn't actually seem to realise my computer even has an HDMI output and only displays options for VGA and my integrated screen.
When I plug it into my LCD screen, sometimes I get a 'No Signal' message and sometimes I get garbled static and a message about unrecognised input and the frequency it's coming at.
I read elsewhere in the forum that someone was able to get video working by editing their xorg.conf file, so I went in and tried to see if I could replicate that, but none of the files in my xorg.conf.d folder had anything related to video outputs (as far as I can tell at this point).
If anyone has any insight on how to approach this problem or any advice on where I can find resources to try and figure it out, I'd really appreciate it.