No change.
http://www.alsa-project.org/db/?f=30b3f0087374b914a20dbe20a618fb892a5d6fd5
Are there any offical specificaion ?
So far most review only mention stereo speakers and subwoofer, the
service
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.
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pc...
You need to define your 2.1 chmap if the subwoofer only use left channel
Compiling and running PulseAudio from git
http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/