Resolving Ubuntu HDMI Sound Issues

The Simple solution works for Ubuntu 18.04 LTS found here.

The summary is as below but I used:

sudo gedit /etc/pulse/default.pa

When signal is lost to HDMI (during sleep) Pulse Audio is automatically configured to active source (your laptop’s speakers). Upon resume the sound device is still your laptop. To override this setting, tell Pulse Audio to never switch sound devices automatically:

  • edit the file /etc/pulse/default.pa
  • find the line load-module module-switch-on-port-available
  • insert a # at the beginning of the line to disable automatic port switching
  • save the file and reboot.

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