[mythtv-users] FE sound stopped working

Jean-Yves Avenard jyavenard at gmail.com
Thu Mar 27 02:21:30 UTC 2014

On 27 March 2014 11:00, Mike Carron <jmcarron at starstream.net> wrote:
> I temporarily switched one FE from my production MBE to a test setup where
> I'm going to attempt to upgrade from 0.25 to 0.27 in the next day or so.
> After I switched it back to the production MBE all was fine for about 15
> minutes and then sound output ceased. The first thing I did was go to Setup,
> verified that nothing had changed and ran the speaker test which was good.
> I'm writing this from a Windows machine where I can't conveniently grab the
> frontend log but at the same time as the sound disappeared a set of 4 error
> messages started appearing in the log:
>     ALSA: setting hardware buffer size to 128
>     ALSA: Error opening /proc/asound/card0/pcm3p/sub0/prealloc: Permission
> denied
>     ALSA: Tryto manually increase audio buffer size...
>     ALSA: Unable to sufficiently increase ALSA hardware buffer size -
> underruns are likely
> Those four error messages repeat regularly as long as I'm trying to play
> something. I've searched various threads dealing with ALSA, buffer size and
> related issues and have not found anything that resembles my situation.
> Any thoughts on where I might look?

You can ignore those.

They aren't error as such, just a hint that you may have buffer underruns.

You haven't reported the problems you are having.

What exactly is happening?

you have no audio, no video what?

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