[mythtv-users] LiveTV access was working, somehow I stopped it working

[Klaas de Waal]

OK, thanks, interesting!

The problem is that column mod_sys is either NULL or UNDEFINED. In the
current mythtv master this field contains the value DVB- T or DVB-T2
for terrestrial. Your old tuner is only capable of DVB-T and then this
field is not being looked at. You new tuner is capable of DVB-T2 and
then this field is being looked at and then it is decided that the
value is not correct. It is probably a good idea to fix this in mythtv
master.

I suggest you do a rescan ("Scan of all existing transports") and this
should then update the values in dtv_multiplex. Please also attach the
content of dtv_multiplex again. This is a procedure that should result
in a working system but it might not always do that...

If your problem is still there then creating a new video source and
doing a "Full Scan" will  create new dtv_mulitplex table entries that
will be correct. The problem with this approach is that you will have
lost recording history; your old recordings are associated with the
old channels and not with the newly found channels in the new video
source.

A brute-force way to fix this is to use a bit of sql. The following
would probably work:
mysql> update dtv_multiplex set mod_sys="DVB-T";

Klaas.






On Thu, 2 Jan 2020 at 00:34, <lists at arewethere.net> wrote:
>
> On Wed, Jan 01, 2020 at 04:08:39PM +0100, Klaas de Waal wrote:
> >
> > Could it be that your new card is DVB-T2 capable and your old card can
> > do only DVB-T?
> >
>
> That is the case, yes.
>
> > To debug this problem it is useful to have the content from table
> > dtv_multiplex which you can print with these commands:
> >
> > $ mysql -u mythtv -p<password> mythconverg
> > MariaDB [mythconverg]> select * from dtv_multiplex;
> > ...
> > MariaDB [mythconverg]> exit
> >
>
> See attached. I don't think there are any T2 format multiplexes
> available here (Australia).
>
> > About how to fix this.
> > You can do a rescan of all existing transports, update all old
> > channels and see if that makes  a difference.
> >
> >
> > If this doesn't work then you can, for testing purposes, do the following:
> > - create a new video source
> > - connect your tuner(s) to the new video source
> > - do a Full Scan
> > and check if your system now works correct.
>
> I was thinking I'd need to try a rescan or full scan,
> but perhaps not for the reasons you have in mind.
> Looking at the updatetimestamp column, it seems like it's time.
>
> Cheers
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