My flickering problem-and solution
I have an HP laptop Pavilion DV7 1232nr that worked fine with Vista - as far as plugging the HDMI output into my Sharp flatscreen TV.
But due to a hundred other problems running Vista I did a clean install of Win7 Ultimate. HP has a site for my particular PC that updates drivers for the touchpad and volume bar, etc. and I had to install those. I've been a happy camper.
But tonight was the first time I plugged my HDMI cable in to watch a DVD. Right off the bat I had all kinds of problems, most of which were resolved by rebooting with the TV connected via the HDMI cable. But the flickering persisted.
I googled and tried to change the screen resolution, which didn't help. Also via googling...