[mythtv-users] Only first channel available, changing channel not working

[Dave M G]

MythTV Users,

I've got a fairly fresh installation of the most recent Mythbuntu up and 
running, on a computer that has a Hauppauge PVR-150.

I've mostly succeeded in getting broadcast television to work. When I 
select to watch television, I get a clear video and audio signal.

When I try to change channels, however, the on screen display shows the 
number changing, but the channel does not actually change. There isn't 
even any kind of flicker or pause indicating any attempt to switch a 
channel. The only thing changing is the channel number. Other than that, 
it stays on the first channel.

In the mythbackend interface, I was able to scan for channels in my area 
(Japan broadcast) and it seemed to have detected the 11 or so channels 
that should be available.

Since MythTV seems to be detecting the channels, I'm at a loss as to 
what to try next in order to diagnose the problem.

Any advice or suggestions would be most welcome.

Thanks.

-- 
Dave M G