Audio routing question

Richard A. Smith smithbone at
Thu Nov 20 06:37:50 EST 2008

Guylhem Aznar wrote:

> Whenever a jack is plugged in, the audio is routed to the jack instead
> of the main speakers. It may not always be desirable (ex: wakeup
> clock)
> Did try to tweak alsa settings, but I couldn't change that.
> Is there a way to override it?

Not without a hardware mod. Plugging in a jack opens up a connection 
that makes the output amp shutdown.

If you were to short pins 4 and 5 on the output jack that signal won't 
ever go high and you could use EAPD to control when the amp is on or off.

Richard Smith  <richard at>
One Laptop Per Child

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