[mythtv-users] smart update and upgrade causes tv to be static

[Michael T. Dean]

On 03/05/2006 05:08 PM, Peter Judge wrote:

>On Tue, 2006-02-28 at 21:42 -0800, Gabe Rubin wrote:
>  
>
>>I upgraded my ivtv, and I think I have things working.  I think my
>>previous problem was that I was trying to use ptune.pl and really, I
>>should have used ivtv-tune to set my channel.
>>
>>Each time I restart now it screws up the channel ivtv is on though,
>>and while I modified myth-load.sh (a script ratpoison executes on
>>startup) to include /usr/bin/ivtv-tune -c 3, I think this is a little
>>bit of a kludgy hack.  Nevertheless, unless someone can tell me the
>>proper way for the channel to be set to 3 each time ivtv is loaded, I
>>will have to continue using this script.
>>    
>>
>
>I do the same. It works fine, except for one case. I start the backend
>as a service in FC3, and if I reboot and the backend starts recording
>immediately on startup I still get static. This is because the mythtv
>user hasn't logged in yet and so the myth-load script hasn't run. It
>doesn't happen to me very often so I'm not worried about it.
>
>I suspect that Myth should be doing this since it is one of the settings
>for the input connections (not sure if I have the name right, it's the
>combination of capture card and channel source).
>
>Does anyone know if this is fixed in SVN, or should I log a bug?
>

I can't tell from the posts in this thread (because of the focus on 
ptune.pl and ivtv-tune--which shouldn't ever be used with Myth), but it 
sounds a lot like what you /really/ want is:

Preset tuner to channel
Leave this blank unless you have an external tuner that is connected to 
the tuner input of your card. If so, you will need to specify the preset 
channel for the signal (normally 3 or 4).

(which has been there since--oh, I don't know--forever?)  If you're 
outputting from an external receiver to your Myth box using an 
RF-modulated signal ("coax"), this tells Myth to always change the 
channel to the one specified.  If you're using S-Video or Composite, 
this should be blank.

Also, this is not useful as a workaround for leaving LiveTV on a DVB 
channel that goes off-the-air sometimes, because it only allows you to 
watch the channel specified (so something has to change what's on that 
channel--something like a VCR or STB).

However, you're much better off using S-Video or Composite than an 
RF-modulated signal.

Mike