[mythtv-users] Sudden audio problem

Jean-Yves Avenard jyavenard at gmail.com
Sat Mar 1 06:38:09 UTC 2014

On Saturday, March 1, 2014, Mike Carron <jmcarron at starstream.net> wrote:

>  After several months of normal operation, one FE (a Zotac ZBOX AD-03
> with Mythbuntu 12.04 0.25/fixes) suddenly dropped sound completely while
> watching live tv. Checking the log produced 4 errors together at the time
> when the sound was dropped:
> ALSA: Setting hardware audio buffer size to 128
> ALSA: Error opening /proc/asound/card0/pcm3p/suub0/prealloc: Permission
> denied.
> ALSA: Try to manually increase audio buffer with: echo 128 | sudo tee
> /proc/asound/card0/pcm3p/sub0/prealloc
> ALSA: Unable to sufficiently increase ALSA hardware buffer size -
> underruns are likely
> I can restart the FE and the same scenario will repeat, some amount of
> time with completely normal sound followed by silence. Those 4 items will
> be in the log at the exact time the sound fails.
> If someone is familiar with this situation and can offer suggestions that
> would be great.
Those messages are harmless. You can ignore them.

Make sure the audio device didn't change in the settings, and that it's not
muted using the alsa-mixer utility
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20140301/5031aed2/attachment.html>

More information about the mythtv-users mailing list