v30 Could not open Decoder on LiveTV

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jiminorris
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Posts: 4
Joined: Sun May 29, 2016 3:52 pm
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v30 Could not open Decoder on LiveTV

Post by jiminorris » Mon May 06, 2019 3:11 pm

I've been using Myth since 0.19 generally with little/no issues. Since upgrading to v30, however, I have two recurring issues I can't seem to figure out.

First is my localisation settings just won't save...

but the main issue is that about 75% of the time, when trying to watch live tv, I get kicked back to the main menu with an error, "could not open decoder," I'm not sure if it's a related issue, but sometimes it does open the decoder, I get a live picture, but there's no sound... any ideas?

Running a Xubuntu 18.10 with mythbuntu repos.

MikeB2013
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Joined: Mon Jul 25, 2016 4:16 pm
Great Britain

Re: v30 Could not open Decoder on LiveTV

Post by MikeB2013 » Mon May 06, 2019 4:48 pm

For the localisation settings issue and without any logs, so I am guessing.
It could be due to your user not being in mythtv group (there is a bug in current mythtv packaging due to underlying *ubuntu changes - removal of gksu).
In a terminal session what is the output of groups command, you should get something like (in my case the user is "mike")

Code: Select all

mike@myth-server-1:~$ groups
mike adm cdrom sudo dip plugdev lpadmin sambashare mythtv
If mythtv is missing from the output, fix it as follows (after which log out or reboot)

Code: Select all

sudo adduser $USER mythtv
For the "could not open decoder" issue, and you are using DVB-T/DVT2 e.g. UK Freeview, there is a known bug see https://code.mythtv.org/trac/ticket/13292 and is still present in latest mythtv master (31pre). There is a workaraound but it involves building mythtv from source - I can provide details if you would like.

One other point (you may be aware, but just in case), for Ubuntu/Debian systems using systemd (xubuntu does), mythtv-setup and manual start/stop of mythtv-backend must be done in a terminal session using systemctl commands as follows:
to stop mythv-backend before using mythtv-setup

Code: Select all

sudo systemctl stop mythtv-backend
then run mythtv-setup, when finished start mythtv-backend as follows:

Code: Select all

sudo systemctl start mythtv-backend
Mike

jiminorris
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Posts: 4
Joined: Sun May 29, 2016 3:52 pm
Great Britain

Re: v30 Could not open Decoder on LiveTV

Post by jiminorris » Tue May 07, 2019 5:19 pm

MikeB2013 wrote:
Mon May 06, 2019 4:48 pm
For the localisation settings issue and without any logs, so I am guessing.
It could be due to your user not being in mythtv group (there is a bug in current mythtv packaging due to underlying *ubuntu changes - removal of gksu).
In a terminal session what is the output of groups command, you should get something like (in my case the user is "mike")

Code: Select all

mike@myth-server-1:~$ groups
mike adm cdrom sudo dip plugdev lpadmin sambashare mythtv
If mythtv is missing from the output, fix it as follows (after which log out or reboot)

Code: Select all

sudo adduser $USER mythtv
No luck there, I'm 100% in the mythtv group!
MikeB2013 wrote:
Mon May 06, 2019 4:48 pm
For the "could not open decoder" issue, and you are using DVB-T/DVT2 e.g. UK Freeview, there is a known bug see https://code.mythtv.org/trac/ticket/13292 and is still present in latest mythtv master (31pre). There is a workaraound but it involves building mythtv from source - I can provide details if you would like.

Mike
Sounds like I'll have to last it out and cross my fingers the fix makes it in to master soon and hope for a backport into -fixes. I can't imagine the wife agreeing to building from source and the risk of downtime on our family TV. I've been spoilt by Debian/apt and haven't built anything (complicated) from source for over 15 years!

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