[mythtv-users] Firewire fleeting on SA3250HD

[John P Poet]

On 7/25/06, Allan Wilson <allanwilson at gmail.com> wrote:
> On 7/24/06, John P Poet <jppoet at gmail.com> wrote:
> > >
> > >
> > > Just an idea but could you be changing to an encrypted channel that
> causes
> > > you to loose your connection to the cable box. I had to create a new
> listing
> > > and tie that listing to my firewire tuner so that firewire would only
> pickup
> > > recording and change to channels it could get to. Just an idea
> > >
> > > Allan
> >
> >
> > Yeah, I did the new lineup from the beginning.  Only channels above
> > 100 show up via the firewire.
> >
> > For kicks I tried tuning HBO and grabbing data via test-mpeg2, but got
> > a zero byte file.  As soon as I switched to a "valid" channel,
> > test-mpeg2 was able to grab data again.
> >
> > I still do not have a reliable recipe to get data via the firewire.
> >
> > I do seem to need to get the firewire synchronized *after* starting
> > mythbackend.  If I have it working, *then* start mythbackend, it
> > looses the sync.  So, I start mythbackend, then proceed to beat on it
> > with various techniques until test-mpeg2 produces some data -- at that
> > point myth will work fine until I restart mythbackend or try to use
> > live tv.
> >
> > John
>
> For what it is worth, I have to do the same thing. Start the backend and get
> the firewire going but once I have it going over my SA3250HD then it usually
> works fine for weeks at a time. If you need any details that I may be able
> to provide ask away and I will pass on what I can. I will throw this out
> there though, I had lots of problems with firewire to begin with and through
> persistance and help of people on this list I was able to get it to work
> reliably and it was worth all the effort. So keep at it and let me know what
> I can do to help
>
> Allan

Thanks Allan.

I am just trying to figure out a *consistent* sequence of events which
are required to "plumb" the firewire after I start mythbackend.  If I
could figure out exactly what is required, I could probably modify
myth's SA3250HD initialization routine to "do the right thing".

John