[mythtv-users] Lose TV tuners after PC reboot

[Stephen Worthington]

On Tue, 24 Apr 2018 08:28:25 +0800, you wrote:

>Hi,
>
>After I reboot my PC, MythTV cannot access my TV tuner box for some reason.
>This means that recordings all fail, and LiveTV just returns immediately to
>the menu page.
>
>I've noticed that this started happening a few months ago.
>
>A "solution" is to stop the BE, run mythtv-setup, go to Setup Capture
>Cards, and simply "enter" each existing card (they are still defined) and
>save and exit. Then restart the BE and all works.
>
>My system details:
>
>* Mythbuntu 16.04
>* MythTV 29.1+fixes
>* Combined FE + BE
>* HDHomerun network dual tuner (HDHR4-2DT)
>
>
>Does anyone have any ideas on how to fix this?
>
>
>Thanks,
>Justin.

That sounds like the problem with mythbackend starting up before the
network is up properly.  Just restarting mythbackend later should be
what fixes it, if that is the case.  It is likely that what you are
doing in mythtv-setup is not making any difference - it is the
stopping of mythbackend to run mythtv-setup and then restarting
mythbackend afterwards.

This post should tell you how to fix it:

https://lists.gt.net/mythtv/users/609209?search_string=systemd%20NetworkManager;#609209

The reason it started happening a while ago is likely due to some
updates happening to other packages which changed the timing of when
mythbackend started.  Race conditions like this are very hard to
debug, and come and go with small changes in other things.  Including
things like the temperature, which affects how long hard disks take to
start up.