How To: Fix Jumpy Pulseaudio Output / Volume

Try editing /etc/pulse/default.pa and changing the line:

load-module module-udev-detect

To read:

load-module module-udev-detect tshced=0

Save. Reboot. (pulseaudio -k && pulseaudio –start may be enough – but no promises).

Source: https://ubuntuforums.org/showthread.php?t=2181335

Working for me so far…