Answer by WinEunuuchs2Unix for No sound on wake, Dummy Output always takes over. 'pulseaudio -k' the fix

It be caused by a new kernel introduced in 19.10 like this case:

• Lagging after update to 19.10 from 19.04

If not then you can use this script /etc/systemd/system-sleep/reloadpulse:

#!/bin/sh# NAME: reloadpulse# PATH: /lib/systemd/system-sleep# CALL: Called from SystemD automatically# DESC: PulseAudo 8 sets sound to dummy ouput when going to sleep.#       This script kills and reloads pulse audio.# DATE: November 25, 2019.# NOTE: Written for ask ubuntu question:#       https://askubuntu.com/questions/1191649/why-no-sound-on-wake-dummy-output-takes-over-pulseaudio-k-the-fixcase $1/$2 in  pre/*)    echo "$0: Going to $2..."    ;;  post/*)    echo "$0: Waking up from $2..."    pulseaudio -k    ;;esac

Mark the script executable with chmod a+x /etc/systemd/system-sleep/reloadpulse

After updates deactivate it with chmod a-x /etc/systemd/system-sleep/reloadpulse

Then if the update didn't fix the problem make it executable again.

You need to reboot for changes to take effect.