No sound on Headphones port in after upgrade

Did you try this ?

[Stable Update] 2021-08-09 - Kernels, Xorg-Server, Systemd, Virtualbox, Mesa, Plasma, Pipewire - #2 by philm

No audio after Pulseaudio v15 update

Try clearing the databases in your home folder of any old settings by executing:

rm ~/.config/pulse/*.tdb ~/.config/pulse/cookie

Reboot afterwards.

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