I'm having the exact issue from the first part of grepico's post: http://forum.linuxmce.org/index.php?topic=4157.0
It seems that when I change the channel via the guide in MythTV I get snow. I can use the cable box remote without any issues but I have to have it on MythTv's channel 3. The issue arises when I try to schedule a recording it only records snow. Do I really need the USBUIRT in order for MythTV's internal guide to change my cable box channels when I just want to watch tv and record a show?
Grepico's thread seems to taper off into another topic and didn't really give a resolution on this issue. Thanks