@Fuseteam tested on my FP4.

The switch beetween headphones and speaker is automatic, music playing works well but when I have a call it switches back to phone speaker. I have to re-enter this commandline after reboot : pacmd load-module module-udev-detect

@purplevvay
I think this is normal behavior.
There is only one volume setting, not different ones for the various output.
You can fill in a feature request, but I don't know how difficult it might be to implement such feature.

@antidroid thanks for looking into that. A rather odd design decision but happy to know that also means they likely used an earspeaker that should tolerate high volumes.