Hawkmoon has the right answer for me, but the words are a little different.

System Settings > Startup and Shutdown > Service Manager
Display Management change monitor
DO NOT use
Stop
Apply

Alas, my screen still flickers every several seconds. :/
Anyway, I figured out what the newer name for XRANDR is called by reading /usr/share/kde4/services/kded/randrmonitor.desktop