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No change.

http://www.alsa-project.org/db/?f=30b3f0087374b914a20dbe20a618fb892a5d6fd5

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Are there any offical specificaion ?

So far most review only mention stereo speakers and subwoofer, the

service

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guide only show how to replace two internal speakers

Service manual mentions "Dolby®-certified surround sound system with two built-in stereo

speakers and

one subwoofer supporting low-frequency effects"

so all additional channels what I'm hearing in Windows is emulated. I hope that it is clear now that my laptop has two internal speakers and one subwoofer.

You have to determine which node 0x16 or 0x17 is your subwoofer and remove the redundant speaker pin fixup

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?

After remove the redundant internal speaker, 5.1 is only available after you change the channel mode

Can alsactl restore the channel mode before pulseaudio probe the sound cards ?

Auto mic select is not enabled when the notebook has mic jack and line in jack , internl mic

As jack retasking is specific to snd-hda-intel and some multi cjannel ac97 codecs

It is not easy to force pulseaudio to stop all client connection, reprobe the profiles on board audio after jack retasking

hdajackretask also perform the same function stop pulseaudio and using dynamic reconfiguration/early patching

For those notebook with headphone spdif combo jack, it need a customised iec958.conf and you can use headphone jack to make iec958 unavailable

http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixe...

[Jack Headphone] state.plugged = no state.unplugged = unknown