[mythtv-users] PVR 150 Fails to Access Motorola Cable Decoder Box Composite Signal

[Michael T. Dean]

On 09/12/2009 05:55 PM, Mache Creeger wrote:
> Thanks for the quick response. I tried what suggested in the post. In 
> mythtv-setup I used delete all for both capture cards and video 
> sources and rebuilt things up one at time from scratch but still got 
> the same problem.
>
> Here is the pertinent /var/log/mythtv/mythbackend.log
...
> 2009-09-12 14:36:45.637 Channel(/dev/video0) Error: 
> GetCurrentChannelNum(550): Failed to find Channel
...
> It is failing with GetCurrentChannelNum even though I specified 
> /usr/local/bin/channel as external channel control. This is a known 
> bug. The workaround is blank out the box "Preset tuner to channel" in 
> mythtv-setup. I did that and everything works fine now. 

That's not a workaround.  The "Preset tuner to channel" setting can 
/only/ be used for those people who are using an external tuner /and/ 
having it output using the worst-possible connection type, RF modulated 
output over a "coax" cable.  For someone using S-video or Composite, you 
can /not/ specify a "Preset tuner to channel" value.

That said, some have said that the "preset tuner" doesn't work, anymore, 
even for those with a proper configuration (have been saying it for 
about 3 years, now), but I can't verify that as I don't have any way to 
test.  And, no one has fixed it since getting a proper S-video/Composite 
connection is /much/ easier and cheaper than spending the time trying to 
fix it.

Glad you have it working.  Enjoy.

Mike