I'd check the 5v output to make sure it's not too high. Are you sure it's well enough regulated? Another option would be to use a car USB charger (cigarette lighter type) to convert the 12v to 5v and not use the 5v output of your supply. If your PSU fails, you'd only have to find a replacement 12v s...

Hi.

I think this is the same as this one:

http://www.waveshare.com/wiki/5inch_HDMI_LCD

Links at the bottom of the page to a recent Raspbian image and modules.

I've yet to look at decreasing touchscreen jitter on mine - please advise if you manage to do this.

Cheers
Dave