Fedora Hardware :: F14 - No HDMI Port Detected / No Display?

Acer Aspire 5820 TimelineX, Mobility Radeon 5650, running open source radeon drivers. Laptop has VGA output (haven't tried it yet, will later tonight, I suspect it works) and an HDMI output. Monitor connected to laptop through HDMI causes garbled picture (either a set of lines made of little square blocks or a pink vertical line running down the leftmost edge with white, dashed horizontal lines travelling up the screen from the bottom to the top and repeating). The previous happens at startup, the latter happens if I disconnect the monitor and plug it back in again after logging in.

Running KDE 4. HDMI port is not detected (does not show up in gnome-config-display or in krandr or in xrandr). It does show my laptop's built in screen and my VGA output, but does not list my HDMI output anywhere. HDMI seems to show up in a message in dmesg, but other than that, no.

Included is the output of a few commands. All commands were run with the monitor plugged in to HDMI. 'monitor-probe-using-X radeon' failed with "Unrecognized option: -probeonly". Monitor does not display anything if plugged in on startup (some people got something, then it disappeared when X started). I haven't played with Xorg.conf yet, I'm not sure what to write for HDMI output. I haven't tried the fglrx drivers yet ((*shudders*)). I can't get any info on this problem, other people have had similar issues but they had trouble with getting a particular resolution to work or no sound through HDMI. I don't care about sound, just want a picture. Monitor is an LG Flatron L246WH. I can use VGA if push comes to shove, but I'd really like to get HDMI working.