Sound is on maximum and mixer doesn't change the sound level in KDE or Gnome (asus notebook)

inxi data shows you have 2 active sound servers

  Sound Server-3: PulseAudio v: 14.2 running: yes 
  Sound Server-4: PipeWire v: 0.3.23 running: yes

AFAIK the 2 sound servers do not work well together
so users need to choose either:

  • Mask pipewire.socket and stop pipewire.service to continue using PulseAudio
systemctl --user mask --now pipewire.socket && systemctl --user stop pipewire.service

OR

  • install manjaro-pipewire to get the additional dependency files for Pipewire and remove PulseAudio packages