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

Mark Knecht markknecht at gmail.com
Fri Nov 18 13:02:51 EST 2005


Hi,
   I run a remote setup for my parents. It's worked very well for
about 6 months. Very few problems. However a couple of days ago my dad
called, told me there was a power outage and wanted to shut the
machines down before the UPS's ran out of juice. We shut them down by
hand even though the APC ups daemon probably would have done it
anyway.

   Since bringing the system up he has had no sound for the last two
days. Video seems to be working fine.

   The backend machine itself is still recording, and alsa is working
on that system. Remotely I can do aplay FILE.wav and my dad reports
that he hears sound, so the failure is not a total sound failure.

   I checked that mythfrontend says it's using /dev/dsp, and that
/dev/dsp does exist:

mark at gandalf ~ $ ls -la /dev/dsp
lrwxrwxrwx  1 root root 9 Nov 18 07:13 /dev/dsp -> sound/dsp
mark at gandalf ~ $

   How can I get more info on what is going wrong?

   I rebooted the system earlier this morning. I'm getting these
troubling messages in the mythbackend.log file:

Starting up as the master server.
2005-11-18 07:13:54.659 New DB connection, total: 2
2005-11-18 07:13:54.706 Channel(/dev/v4l/video0)::Open(): Can't open
video device, error "No such file or directory"
2005-11-18 07:13:54.760 Channel(/dev/v4l/video0)::Open(): Can't open
video device, error "No such file or directory"
2005-11-18 07:13:54.761 ChannelBase: Could not find input: Tuner 0 on
card when setting channel 4

2005-11-18 07:13:54.766 New DB scheduler connection
2005-11-18 07:13:54.776 New DB connection, total: 3
2005-11-18 07:13:54.784 mythbackend version: 0.18.1.20050510-1 www.mythtv.org
2005-11-18 07:13:54.841 Enabled verbose msgs :important
2005-11-18 07:14:02.391 Seem to be woken up by USER
2005-11-18 09:40:42.939 adding: gandalf as a client (events: 0)
2005-11-18 09:40:51.522 adding: gandalf as a client (events: 1)


However /dev/v4l/video0 does exist:

gandalf ~ # ls -al /dev/v4l/video
video0   video24  video32
gandalf ~ # ls -al /dev/v4l/video0
crw-rw----  1 root video 81, 0 Nov 18 07:13 /dev/v4l/video0
gandalf ~ #

   Any ideas welcome.

Thanks,
Mark


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