Story of a Desktop User

[Adrian Chadd]

The newer sound stuff has a whole bunch of interesting interconnects
internally that let you wire things around between functional blocks,
inputs and outputs.

I seem to recall that sometimes you have a hardware-only jack that
does this. Sometimes its a software only thing where the hardware has
a switch that the software uses to flip the output wiring.

So depending upon the chipset and what it implements, it may be some
automagic wiring done by the driver that's enumerated at boot time.
Boot with -v and see if you get this nice verbose output from the
sound driver explaining how all the connections are wired up.




-adrian


On 19 November 2013 06:23, Julian H. Stacey <jhs at berklix.com> wrote:
> Eitan Adler wrote:
>> The hardware switches from speakers to headphones automagically when I
>> plug in headphones.  I like this behavior but it would be great if
>> there were a sysctl to disable it.
>
> If it's a mini jack that may be an artifact of the socket,
> in which case no software can control it.
>
> Cheers,
> Julian
> --
> Julian Stacey, BSD Unix Linux C Sys Eng Consultant, Munich http://berklix.com
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