[MPlayer-users] option to avoid "Audio: no sound"?

[Nix]

  On 2010.10.16. 22:07, Frederik Eaton wrote:
> Dear MPlayer Users,
>
> Sometimes I start MPlayer and for whatever reason audio is not functional. This
> condition might arise because MPlayer couldn't open /dev/dsp, for instance.
> MPlayer opens a window and starts playing video, but after a few minutes I
> realize that there is no audio, and when I go back to the terminal from which I
> started MPlayer there is a line in the middle of a lot of output saying:
>
> Audio: no sound
>
> Is there a configuration option I can set which will cause MPlayer to quit in
> this situation, rather than playing the video without the sound? I would much
> prefer it to quit. If I really want it to play video without sound, I can always
> pass "-ao null".
>
> Thank you,
>
> Frederik Eaton
>
>
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> MPlayer-users at mplayerhq.hu
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I'm in no way an expert but I'm pretty certain that that should not 
happen on any modern Linux based OS.
The only sane explanation would be that you are running some very old 
software that is directly accessing and hogging /dev/dsp all for itself.
Hence what software are you running?
Cheers!
nix