[Bug 1847570] Re: PulseAudio automatically switches to HDMI sound output on login

[Daniel van Vugt]

It appears the upstream fix in master (PulseAudio 14) does not apply and
can't work in PulseAudio 13 so we will stick with the revert in
PulseAudio 13. The patch in comment #34 is still awaiting
sponsorship/publishing.

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https://bugs.launchpad.net/bugs/1847570

Title:
  PulseAudio automatically switches to HDMI sound output on login

Status in PulseAudio:
  New
Status in pulseaudio package in Ubuntu:
  Fix Released
Status in pulseaudio source package in Eoan:
  Fix Committed
Status in pulseaudio source package in Focal:
  Fix Released

Bug description:
  [Impact]

  On my freshly installed eoan system I have two output devices:
  - HDMI/DisplayPort 2 - GK208 ...
  - Line Out - Family 17h ...

  When I login into the system pulseaudio always select the "wrong"
  one (HDMI) and I need to go to gnome-settings/Sound/Output Device
  and switch to "line out". This applies to every login/logout not
  just reboots.

  [Test Case]

  0. Plug in a monitor that supports HDMI audio (one that appears in
  your Settings>Sound)

  1. Log out and in again.

  Verify the default audio device in Settings is still speakers or
  headphones. Not the monitor's HDMI audio device.

  [Regression Potential]

  Low. The fix proposed just reverts to the same code used in PulseAudio
  12 and earlier. It has also been released and verified on focal
  already.

  [Workaround]

  Comment out:

  load-module module-switch-on-port-available
  load-module module-switch-on-connect

  from /etc/pulse/default.pa

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