mythtv and screen blanking

So I’ve had my mythtv box running nicely for quite a while now but one annoying thing I couldn’t figure out was how to stop the annoying screen blanking. I’d set various dpms parameters in xorg.conf, turned off the screensaver. But it kept blanking. The most annoying part was that it hadn’t always happened.

Anyhow, I finally found the one command to stop it; xset -dpms.