HDMI "no signal" issue and weird fix

[jgrn]

I edited my original post, but basically: I'm running 1.0b1 (the latest), and the cable has previously worked fine with my laptop and, as I said, with "perfect" timing I can get it to work with the RPi. The HDTV is a Vizio E601I-A3. I've tried hdmi_ignore_edid=0xa5000080, but are there other EDID tricks I can try out? Re: power issues -- I'm using a Belkin 4-port USB hub using one of the USB ports to power the RPi (as was suggested elsewhere on the interwebs).