[alsa-devel] Front speakers doesn't work in multichannel output, regression in ALC888

[Raymond Yau]

> My problem is that when I set channel output to "Analog output surround
> 5.1"
> (or 2.1 or 4.1), I hear no sound in front speakers, but in case of 5.1 or
> 4.1
> I can hear sound in rear speakers. I use kernel 3.19.5 and it didn't
> happen in
> earlier kernels that is 3.18 and in 3.17 for sure.
>
> My configuration is:
> OS: Fedora 21 64 bit
> SoundCard: ALC888
> Model name: acer-aspire-4930g
> Laptop: Acer Aspire 5930g
> Speakers: external 5.1 with 3 jacks
> Sound channel configuration module is standard configuration module from
> KDE.
>
> Additional info:
> 1) When channel output is 5.1 and I unplug green jack and leave two others
> jacks connected then I can hear sound in laptop internal speakers.
> 2) Earlier (kernel 3.18 and 3.17) I didn't have possibility to choose 2.1
> configuration and additionally to 4.1 configuration I could also choose 4.0
> configuration.
>
> You need to switch "Channel mode" to "6 ch" if you need to use external
5.1 speakers since you have 5.1 internal speakers

this change pin-ctl of headphone jack, mic jack and line in to OUT

post the output of alsa-info.sh