Comment 63 for bug 1002978

On an Acer Aspire 5810TG running Ubuntu 18.04 with latest 5.3 kernel. HDA Intel. ALC269 Analog. Pulseaudio was monitoring minimal sound from internal mic with both channels on, but ok with either left or right off. Audacity and Gnome Sound Recorder had no issues. Audacity showed two phase inverted channels. Same issues as above re Skype and Hangouts and same workarounds worked. External mono plug in mic - no problem.

Same problem on same machine with Debian 10 Buster.

Tried remapping the Pulseaudio stereo channels to mono which allowed even output through both speakers. For instructions see:

https://wiki.archlinux.org/index.php/PulseAudio/Troubleshooting#No_microphone_on_Steam_or_Skype_with_enable-remixing_=_no

After this, Pulseaudio still has to have one internal mic channel off to function. However output is now through both speakers instead of one.

In Ubuntu, Audacity shows two channels with same phase. In Debian, Audacity shows one mono channel. Same difference through the speakers.

I believe this is still a bug as Pulseaudio cannot produce output from with a phase inverted stereo internal mic as Audacity and Sound recorder can.

Best regards,
Your bleeding user