Sound stopped working -

[T.C. Hollingsworth]

On Feb 3, 2012 10:27 AM, "Bob Goodwin" <bobgoodwin at wildblue.net> wrote:
>
>
>       Sound stopped working after I tried a USB Sound Adapter, which
>       only lit its indicator leds.
>
>       Normally the following should produce sound from the loudspeaker.
>       [root at box6 bobg]# aplay /usr/share/sounds/purple/login.wav
>       ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
>       aplay: main:660: audio open error: Device or resource busy
>
>       It does not, and no sound shows on the PAVC input or output
>       bars. I'm not certain of how signal moves through the sound
>       circuit but it looks like it doesn't get from PA to ALSA input?
>
>       I can feed a signal into the sound input jack and produce normal
>       indications on the PAVC display and sound at the loudspeaker.
>
>       Apparently plugging in that USB "sound adapter" switched
>       something in the logic. Rebooting has not changed things? Is
>       there a default conig. file somewhere?
>
>       I've tried everything I can think of via the alsamixer display
>       settings.
>
>       Everything did work normally before this.
>
>       Also, it would be helpful if there was a way to generate a
>       continuous tone or keep aplay looping continuously when messing
>       with cables under the desk, etc. I have not been able to find
>       anything to do that.
>
>       Suggestions wanted, what do I do next?
>
>       Bob

If aplay is working then something is probably screwed up in your
PulseAudio configuration.

Please post the full output of "pacmd info", which dumps Pulse's
configuration.

-T.C.
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