Date: Tue, 19 Nov 2013 22:05:47 -0800 From: Kevin Oberman <rkoberman@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: Eitan Adler <lists@eitanadler.com>, "Julian H. Stacey" <jhs@berklix.com>, desktop@freebsd.org, "freebsd-mobile@freebsd.org" <mobile@freebsd.org> Subject: Re: Story of a Desktop User Message-ID: <CAN6yY1sGPNsNZCyoJpeSa%2B3YT6=Teg=GUH7_pcyE4ociRHYcvg@mail.gmail.com> In-Reply-To: <CAJ-Vmo=XpN9Bx4eZ-f_Jjq5gNR%2BnLCrZRqhsh1F-43LyF7OSiA@mail.gmail.com> References: <CAF6rxgmQVKizx2UOZst0MoeyP5fsKzT%2BGYi2RFEgvJFXzWbB8Q@mail.gmail.com> <201311191423.rAJENKDc010371@fire.js.berklix.net> <CAJ-Vmo=XpN9Bx4eZ-f_Jjq5gNR%2BnLCrZRqhsh1F-43LyF7OSiA@mail.gmail.com>
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On Tue, Nov 19, 2013 at 7:20 PM, Adrian Chadd <adrian@freebsd.org> wrote: > 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@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 > > Interleave replies below like a play script. Indent old text with "> ". > > Send plain text, not quoted-printable, HTML, base64, or > multipart/alternative. > > Extradite NSA spy chief Alexander. > http://berklix.eu/jhs/blog/2013_10_30 > On most sound systems using snd_hda you can do this fairly easily, though figuring out the exact incantations can require a bit of reading and thought. Details (including sysctls) may be found in snd_hda(4). -- R. Kevin Oberman, Network Engineer E-mail: rkoberman@gmail.com
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