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

[Takashi Iwai]

At Sat, 02 May 2015 07:42:27 +0200,
Łukasz Wojniłowicz wrote:
> 
> Hi all,
> 
> 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.
> 
> Thanks for looking into problem.

I don't remember any relevant change...  Could you try git bisect?


thanks,

Takashi