[mythtv-users] Re: dual head setup getting screen size from first screen

[djg at pdp8.net]

   I asked on this list a while ago (archive doesn't seem to be searchable
and google isn't finding it) with this same problem.  If I remember correctly 
it worked properly until .17.  If I manually specify -geometry 640x480 when 
starting mythfrontend it works ok for me so haven't looked into it further.  
See if -geometry works better than specifying size and position.