I know the 7d is capable of outputing 1080i through the mini hdmi connector even during recording... but I can't get anything but 480p to appear on 2 different monitors (23" LED computer monitor with hdmi input - hp2311x and my 50" panasonic plasma TV with hdmi input)

I can't find the right configuration settings for my canon 7d to ensure 1080i hdmi output.

Please help, this is very frustrating!

Ok... figured something out. I had a hdmi power splitter in between my 50" plasma and the 7d. Once I removed that... the 1080i signal appeared.

The HP2311x must not like a 1080i signal. I will test another high speed hdmi cable to be sure later.