<p><br>
> > > No change.<br>
> > ><a href="http://www.alsa-project.org/db/?f=30b3f0087374b914a20dbe20a618fb892a5d6fd5"> http://www.alsa-project.org/db/?f=30b3f0087374b914a20dbe20a618fb892a5d6fd5</a><br>
> ><br>
> > Are there any offical specificaion ?<br>
> ><br>
> > So far most review only mention stereo speakers and subwoofer, the service<br>
> > guide only show how to replace two internal speakers<br>
><br>
> Service manual mentions<br>
> "Dolby®-certified surround sound system with two built-in stereo speakers and<br>
> one subwoofer supporting low-frequency effects"<br>
><br>
> so all additional channels what I'm hearing in Windows is emulated. I hope<br>
> that it is clear now that my laptop has two internal speakers and one<br>
> subwoofer.<br>
></p>
<p>You have to determine which node 0x16 or 0x17 is your subwoofer and remove the redundant speaker pin fixup</p>
<p>>Thanks. I know how to help myself, but I expected it by default. I wonder how > many other users will manage to get their sound working good as before > regression. > And wasn't "model=acer-aspire-4930g" some sort of early patching which was > thrown out of official code?</p>
<p>After remove the redundant internal speaker, 5.1 is only available after you change the channel mode</p>
<p>Can alsactl restore the channel mode before pulseaudio probe the sound cards ?</p>
<p>Auto mic select is not enabled when the notebook has mic jack and line in jack , internl mic</p>
<p>As jack retasking is specific to snd-hda-intel and some multi cjannel ac97 codecs</p>
<p>It is not easy to force pulseaudio to stop all client connection, reprobe the profiles on board audio after jack retasking</p>
<p>hdajackretask also perform the same function <br>
stop pulseaudio and using dynamic reconfiguration/early patching<br><br></p>
<p>For those notebook with headphone spdif combo jack, it need a customised iec958.conf and you can use headphone jack to make iec958 unavailable</p>
<p><a href="http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/paths/iec958-stereo-output.conf">http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/paths/iec958-stereo-output.conf</a></p>
<p>[Jack Headphone]<br>
state.plugged = no <br>
state.unplugged = unknown</p>