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connecting second HDMI/DVI monitor mostly makes Samsung TV sound disappear

  • PipeWire version (pipewire --version): 0.3.76
  • Distribution and distribution version (PRETTY_NAME from /etc/os-release): Fedora Linux 38 (Workstation Edition)
  • Desktop Environment: Gnome 44.3
  • Kernel version (uname -r): Linux 6.4.6-200.fc38.x86_64
  • GPU/Sound card: AMD Radeon™ RX 580 Series

Description of Problem:

I have sound when I connect HDMI to a Samsung TV. If I plug in a second monitor with HDMI or HDMI (sound card) to DVI (monitor), the Samsung TV loses sound. If I unplug the second monitor, the Samsung TV sound always comes back.

How Reproducible:

I have tried 2 Acer monitors, another Samsung monitor, and a LG monitor. The LG monitor seems to be working fine. All the other 3 monitors does not work. However, there was one morning (for about 2 hours) briefly where sound on Samsung TV worked even while connected to one Acer monitor, which leads me to think it is more likely a software issue. I don't recall doing anything special that day, but I was trying things the previous day (and did not work). I didn't do anything the morning that it worked (even a reboot), and after a couple of hours, the sound again disappeared (without me doing anything that I'm aware of).

I have tried rebooting while the HDMIs are connected, and restarted services. The bar in pavucontrol shows sound is being output.

Steps to Reproduce:

  1. Turn on TV - play sound/music
  2. Plug in second monitor - TV sound disappears

Actual Results:

No sound coming from Samsung TV

Expected Results:

Sound continue playing on Samsung TV

Things I have tried

aplay

speaker-test

pavucontrol

pactl

systemctl restart pipewire* wireplumber

Using 16-bit sampling as in #3016 (closed)

Originally the profile seemed to default to the new plugged in monitor, but now I defaulted it to the TV.

Maybe some other investigative commands which I don't remember now. Please let me know if I can give any further information or maybe where else would be best to investigate this issue.

EDIT I added pw-dump and the diff for the LG monitor below. Also posted here: https://github.com/alsa-project/alsa-lib/issues/347

Additional Info (as attachments):

Edited by A W