[mythtv-users] remote MythTV system has suddenly lost sound

Mark Knecht markknecht at gmail.com
Fri Nov 18 18:05:51 EST 2005


On 11/18/05, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> >
> >
> Heh.  You've lost your "-l".  ;)

I'm lame. I don't get it.

>
> >gandalf ~ # ls -al /dev/v4l/video0
> >crw-rw----  1 root video 81, 0 Nov 18 07:13 /dev/v4l/video0
> >gandalf ~ #
> >
> >
> Is the user running mythbackend in the video group?  Is the user running
> mythfrontend in the (probably) audio group?
>
> Perhaps group settings got changed before the reboot.  Since Myth was
> already running in a process with previous group settings, they didn't
> cause problems.  However, when rebooting, Myth got a new process--with
> the new group settings...
>
> Mike

I've found one problem. The machine has two kernels. It appears that
the default setting is for the old kernel. I have no idea what kernel
was running before.

I've updated the ivtv driver for the new kernel and it is loading
fine. The problems we are seeing now are:

1) Old recordings have audio. Recent recordings do not. Chalk that up
to some temporary problem that we'll fix. No big deal.

2) Watch TV just freezes. We get 1 second of audio and 1 second of
video. The frozen screen sits for 5-10 second and then Myth comes back
to the normal 6 circle screen where you choose what do do. This is a
major problem.

3) If I look in the mythbackend log file I see this:

2005-11-18 14:51:35.786 joined null string in WriteStringList
2005-11-18 14:52:14.938 adding: gandalf as a client (events: 0)
2005-11-18 14:52:14.954 adding: gandalf as a client (events: 0)
2005-11-18 14:52:14.961 adding: gandalf as a remote ringbuffer
2005-11-18 14:52:17.367 joined null string in WriteStringList
2005-11-18 14:55:22.760 adding: gandalf as a client (events: 0)
2005-11-18 14:55:22.908 adding: gandalf as a client (events: 1)
2005-11-18 15:00:02.383 ChannelBase: Could not find input: Tuner 0 on
card when setting channel 2

We attempted to set up a 3PM recording on channel 2. The last line
looks like problems.

I'm looking at the failing machine and comparing it to my working
machine here. The groups seem to be the same.

- Mark


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