[mythtv-users] HDHomeRun issues following OS upgrade to Ubuntu 18.04 from 16.04

[Stephen P. Villano]

Curently, still working on a forced upgrade.
HD failed on primary control machine, necessitating a replacement with 
an already staged replacement SSD. It was on its way out, finally went 
out in the morning, not allowing me to logon at all.
Annoyingly, some software was lost, updates for specific hardware 
that'll have to be redownloaded.
Ubuntu 20.04 LTS, still lagging, much to my annoyance, although, 
premature release and infinite updates is even more annoying.
Still, there are times when getting out my ten pound reprogramming 
hammer feels appropriate.  ;)

On 8/28/20 6:05 AM, Stephen Worthington wrote:
> On Fri, 28 Aug 2020 11:33:06 +0200, you wrote:
>
>> Hi.
>>
>> I have just upgraded the operating system on my backend machine to
>> Ubuntu 18.04 from 16.04. The MythTV version before and after the OS
>> upgrade is the same: 0.29 from the Mythbuntu PPA.
>>
>> Once I fixed the LIRC problem (by running Stephen Worthington's script
>> and also changing the LIRC driver to default instead of devinput) I
>> could record and channel-change from my PVRUSB2 tuners.
>>
>> My HDHR tuners are another matter: when I open Live TV and change input
>> to one of the HDHR tuners I get a picture, but when I try and change to
>> another channel I get a timeout after 20 seconds. I change channels from
>> an event script thusly, and this worked fine before the upgrade:
>>
>> #!/bin/bash
>>
>> # Call as event script with parameters %CARDID% and %CHANID%
>>
>> # Parameters
>> OURSOURCEID=4
>> OURDVBCMOD=a8qam256-6875
>> OURHDHRDEVICE=1420577E
>>
>> /usr/bin/logger $0: $*
>> if [ "$1" == "%CARDID%" ] ; then
>>    exit 0
>> fi
>>
>> SOURCEID=`/usr/bin/mysql -umythtv -pmythtv -s -N -e "SELECT sourceid
> >FROM capturecard WHERE cardid=$1;" mythconverg`
>> if [ "$SOURCEID" != "$OURSOURCEID" ] ; then
>>   exit 0
>> fi
>>
>> MPLEXID=`/usr/bin/mysql -umythtv -pmythtv -s -N -e "SELECT mplexid FROM
>> channel WHERE chanid=$2 AND sourceid=$SOURCEID;" mythconverg`
>>
>> FREQ=`/usr/bin/mysql -umythtv -pmythtv -s -N -e "SELECT frequency FROM
>> dtv_multiplex WHERE mplexid=$MPLEXID;" mythconverg`
>>
>> TUNER=`/usr/bin/mysql -umythtv -pmythtv -s -N -e "SELECT
>> RIGHT(videodevice,1) from capturecard where cardid=$1;" mythconverg`
>>
>> /usr/bin/logger $0: Issuing command /usr/bin/hdhomerun_config
>> $OURHDHRDEVICE set /tuner$TUNER/channel $OURDVBCMOD:$FREQ
>> /usr/bin/hdhomerun_config $OURHDHRDEVICE set /tuner$TUNER/channel
>> $OURDVBCMOD:$FREQ
>>
>> I see in the logs that this is indeed being called. Here are a few
>> sample entries:
>>
>> Aug 28 09:46:15 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:290
>> Aug 28 09:46:16 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:290
>> Aug 28 09:46:23 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:298
>> Aug 28 11:02:40 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:298
>> Aug 28 11:02:41 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:298
>> Aug 28 11:02:49 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:298
>> Aug 28 11:02:51 dracor mythtv: /home/mythtv/chch_hdhr: Issuing command
>> /usr/bin/hdhomerun_config 1420577E set /tuner0/channel a8qam256-6875:298
>>
>> Another symptom is that when I enter the Cards menu in mythtv-setup it
>> hangs on the "Loading..." screen such that I have to kill it (with
>> signal -9).
>>
>> I would appreciate any guidance anyone might have.
>>
>> Thanks, Jan
> I thought that HDHRs were fully supported by MythTV - mythbackend
> should handle channel scanning and channel changing.  There should not
> be any need for a channel changing script.
>
> https://www.mythtv.org/wiki/Silicondust_HDHomeRun_Dual
>
> I presume that you have installed one of the fixes that makes
> mythbackend wait for the network to be actually available before it is
> started.  Ubuntu 18.04 starts up quite a bit faster than 16.04,
> especially if it is running from an SSD, and if you do not have a fix
> for this race condition, even if you did not need it in 16.04 you
> almost certainly will need it in 18.04.
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