[mythtv] Possible to have an 'OSD Off' switch?

[John Freer]

Hi all:

Quick question for the dev team.  What would it take to install a
switch under the 'OSD' setup screen that globally turns off all OS
display items?

I'd like to use XvMC and not have flicker/hangs.  I'm willing to
sacrifice the OSD to do it.  

Possible?

Thanks,
John.