[mythtv-users] Delaying until HDHR tuners are up before starting mythtv-backend

[James Abernathy]

On Mon, Jan 2, 2023 at 6:44 PM Bill Meek <keemllib at gmail.com> wrote:

> On 1/2/23 16:55, James Abernathy wrote:
> >
> >
> > On Mon, Jan 2, 2023 at 5:42 PM James <jam at tigger.ws <mailto:
> jam at tigger.ws>> wrote:
> >
> >
> >
> >      > On 3 Jan 2023, at 6:27 am, James Abernathy <jfabernathy at gmail.com
> <mailto:jfabernathy at gmail.com>> wrote:
> >      >
> >      > When I have my HDHR Quatro tuner connected to my router I'd just
> use a local-network-pingable service to wait until the tuners were
> >     pingable.
> >      > That works, but to reduce a lot of the network errors I was
> getting with the HDHR tuners I've been directly connecting them. That's been
> >     working great with no errors due to the connection. But I've been
> restarting the backend manually to make sure the tuners were up.
> >      >
> >      > You can't use the pingable method of delaying the backend because
> the 169.254.x.x IP of the HDHR changes every boot. This doesn't affect
> >     mythtv-backend because it uses the tuner ID so I need a new method
> of waiting on the tuners.
> >
> >     Jim I don't know how you do DNS. I use dnsmasq but every
> router/modem I've seen also allows you to assign a mac address to an IP so
> you
> >     always get the same IP on the same device
> >     James
> >
> > If I was connected to a router that is what I do.  In this case I'm
> directly connecting the HDHR tuner to a 2nd port on my NUC PC. In that case
> > the HDHR will assign itself an IP of 169.254.x.x randomly on the x's. I
> just set up my PC port to a static IP of 169.254.0.1 with a subnet mask
> > of 255.255.0.0. That all works, it is just the delaying function that is
> killing me. I guess I could do a delay on the mythtv-backend to wait
> > for a mythtv-backend.timer to start 1 minute after boot. But who wants
> to introduce a race condition.
> IPv4 Link Local on the host shouldn't have an address assigned either.
> The two ends will figure their addresses out. Link Local should be an
> option if you're setting the NIC up with some tool.
>
> I DON'T think this is the issue, but it's the right thing to do.
>
> Try:
>
>    hdhomerun_config 1074C841 get /tuner0/status
>
> the above after a restart and successful MANUAL discover command.
>
> I'd disable backend startup to test ideas that prove tuners are
> available (which is what the backend log is complaining about:
>
>    ... Added 0 devices from 1074C841 ...
>
>
>
> Bill
>

Thanks, that will give me some stuff to try.  I did play with the
hdhomerun_check.py program.  After it had a successful "hdhomefun_config
discover" command I tried different sleep delays until I found what
worked.  10 seconds allowed the backend to connect with 2 tuners and 20
seconds found all 4.

I'll try working on some of your suggestions.

Jim A
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