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

[Nick]

On 18/11/05, Mark Knecht <markknecht at gmail.com> wrote:
> 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,

I would check to make sure that the ivtv card is correctly defined in
the database (either check the DB directly or use mythtvsetup). It may
be (from the errors) that the currently defined card is now
incorrectly setup and as such the backend can't use Tuner0, although
it is still defined in the card's setup within MythTV.

As it's an ivtv card, I'd also check the ivtv output upon driver
loading to make sure the tuner itself is being correctly identified
and initialised. May also be worth using ivtvctl to get the info on
the card's setting now you've upgraded to newer ivtv drivers.

Nick