Sound defaults to Headset

[HLing]

Thanks for the bump @natasha , I've been putting this off... PulseAudio is the bane of GNU/Linux.

The Internal and Headset ports are available via a single sink and source. The Headset has priority, you can evaluate this using pactl:

Code:

pactl list sources
pactl list sinks

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Installing the 5.8 kernel solves this issue (comment).

Code:

sudo apt update && sudo apt install linux-image-5.8-sunxi64
sudo reboot

Headset now correctly manifests as 'Headset (Unplugged)'. The Internal speaker and Internal microphone are now the default.

Priorities are unchanged, meaning the active source and sink ports can change when a Headset is plugged in.

I was realizing that the headset problem was solved a few updates ago, but couldn't find the exact update that fixed it. 
now 'uname -a' gets me: Linux mobian 5.8-sunxi64 #6 SMP Sun Oct 18 12:56:04 UTC 2020 aarch64 GNU/Linux

for a while in the Setting - Output Device, the Test doesn't say "Front Right", and "Front Left" any more. Instead, it would have one of the 4 sounds for both channel. So then  just now, the 2nd time I hit test, and the woman's voice is back saying Front Right, Front Left.  The default is on the Internal mic.  Incoming calls have been working fine. No complaint about voice quality.