Thought I'd sorted it. Just found this file: /usr/lib/libXvMCNVIDIA.so.1.0.9746 so I entered that into /etc/X11/XvMCConfig It seems to break things though. Screen just goes blank for live TV and mythfrontend output seems to be constantly timing out or something. I've switched the file back fro now. Anyone else had this? Damian