[mythtv-users] Need mythtv-backend startup advice

[Don Brett]

On 7/13/2019 2:57 PM, Don Brett wrote:
> On 7/13/2019 1:29 PM, Stephen Worthington wrote:
>> On Sat, 13 Jul 2019 12:56:28 -0400, you wrote:
>>
>>> I have a new installation of Ubuntu-Mate (18.04).  It works fine, but I
>>> just realized the HD Homerun inputs are having a minor problem.  On
>>> power-up, or reboot, all the HDHR inputs come up as unavailable.  I
>>> restart mythtv-backend and all is well.  Does it sound like a systemd
>>> configuration issue?  I'm using the systemd conf, as-installed.
>>>
>>> Don
>>>
>>> PS - The Hauppauge HDPVR works fine; this only  happens on the
>>> SiliconDust HDHR connect hardware.
>>>
>>> Restart command:
>>> sudo systemctl stop mythtv-backend
>>> sudo systemctl start mythtv-backend
>>>
>>>
>> >From 
>> /etc/systemd/system/multi-user.target.wants/mythtv-backend.service:
>>> (symlinked to /lib/systemd/system/mythtv-backend.service):
>>> [Unit]
>>> Description=MythTV Backend
>>> Documentation=https://www.mythtv.org/wiki/Mythbackend
>>> After=mysql.service network.target
>>>
>>> [Service]
>>> User=mythtv
>>> EnvironmentFile=-/etc/mythtv/additional.args
>>> ExecStart=/usr/bin/mythbackend --quiet --syslog local7 $ADDITIONAL_ARGS
>>> StartLimitBurst=10
>>> StartLimitInterval=10m
>>> Restart=on-failure
>>> RestartSec=1
>>>
>>> [Install]
>>> WantedBy=multi-user.target
>> That is caused by mythbackend being started before the network is
>> fully available.  So mythbackend can not access the network tuners
>> when it tests them at startup and it marks them as unavailable. There
>> are a number of threads on this list about it.  I have a fix on my web
>> server, so I will repeat my instructions for installing it:
>>
>> =====================================================================
>> The fix is a bit complicated - you have to make a systemd unit that
>> tests for the Ethernet interface actually being up and able to pass
>> traffic, and then have mythbackend wait on that unit before it is
>> started.  The tools to do this are on my web server.  If you are not
>> running a server version of Ubuntu and have not disabled
>> NetworkManager, run the following commands to set it all up. Watch
>> out for line wrapping - my email client does that with longer lines
>> such as the wget commands, so the wget and the URL after it should be
>> on one line.
>>
>> sudo su
>> cd /usr/local/bin
>> wget http://www.jsw.gen.nz/mythtv/wait-until-pingable.py
>> chmod u=rwx,g=r,o=r wait-until-pingable.py
>> systemctl enable NetworkManager-wait-online.service
>> systemctl start NetworkManager-wait-online.service
>> cd /etc/systemd/system
>> mkdir mythtv-backend.service.d
>> chmod u=rwx,g=rx,o=rx mythtv-backend.service.d
>> cd mythtv-backend.service.d
>> wget
>> http://www.jsw.gen.nz/mythtv/mythtv-backend-wait-until-pingable.conf
>> chmod u=rw,g=r,o=r mythtv-backend-wait-until-pingable.conf
>> cd ..
>> wget http://www.jsw.gen.nz/mythtv/local-network-pingable.service
>> chmod u=rw,g=r,o=r local-network-pingable.service
>>
>> Here you will need to change the text in
>> local-network-pingable.service where it says "switch.jsw.gen.nz" and
>> replace that with the IP address or DNS name of your first network
>> tuner (if the tuner is pingable), or otherwise something on your
>> network such as your switch or router that is normally pingable when
>> your MythTV box is booting.
>>
>> Use nano or your favourite editor:
>>
>> nano local-network-pingable.service
>>
>> Then save the change and exit from nano or your editor and do these
>> commands:
>>
>> systemctl enable local-network-pingable.service
>> systemctl start local-network-pingable.service
>> systemctl status local-network-pingable.service
>>
>> The systemctl status command should show that the
>> local-network-pingable.service has started and the ping worked. If
>> not, fix that before proceeding.  Then do these commands:
>>
>> systemctl daemon-reload
>> exit
>>
>> After that, on boot mythbackend will wait for either the ping to work,
>> or the 30 second timeout specified in the
>> local-network-pingable.service file.  If you want to change that
>> timeout, it is the "30" after the ping address.
>> =====================================================================
>> _______________________________________________
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>> mythtv-users at mythtv.org
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>> MythTV Forums: https://forum.mythtv.org
>>
> Thanks Stephen, I'll go through it this weekend,
>
> Don
>
>
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Thanks Stephen, that fixed it.

Don