debcrafters-packages team mailing list archive

[Declan Sefton <2120236@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hardware:
Motherboard: Gigabyte B450M-DS3H (S/PDIF: Realtek ALC887-VD)
Graphics Card: AMD Radeon RX 470/480/570/580/590
Display: Vizio M556-G4 TV connected via HDMI

Problem Summary:
The Vizio TV provides a blank EDID, which was worked around by forcing a manual EDID file via a kernel parameter (drm.edid_firmware).
The kernel driver is now proven to be functional for 6-channel LPCM audio via a direct speaker-test -D hw:0,9 -c 6 test.
The TV cannot handle 6-channel LPCM from external sources, but it can handle compressed AC3 (Dolby Digital), as proven by its native apps.
The goal is to force PipeWire to encode the HDMI audio to AC3.
The issue is that PipeWire/WirePlumber ignores all attempts to add the iec958.codecs = [ "AC3" ] property. I have tried user-level .lua scripts, system-level .conf overrides in /etc/pipewire, and system-level .conf overrides in /etc/wireplumber. In every case, wpctl inspect says that the property is not being applied or updated.

** Affects: pipewire (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2120236

Title:
  WirePlumber on Ubuntu 24.04 ignores all configuration overrides for
  AMD HDMI audio (alsa_card.pci-0000_06_00.1

Status in pipewire package in Ubuntu:
  New

Bug description:
  Hardware:
  Motherboard: Gigabyte B450M-DS3H (S/PDIF: Realtek ALC887-VD)
  Graphics Card: AMD Radeon RX 470/480/570/580/590
  Display: Vizio M556-G4 TV connected via HDMI

  Problem Summary:
  The Vizio TV provides a blank EDID, which was worked around by forcing a manual EDID file via a kernel parameter (drm.edid_firmware).
  The kernel driver is now proven to be functional for 6-channel LPCM audio via a direct speaker-test -D hw:0,9 -c 6 test.
  The TV cannot handle 6-channel LPCM from external sources, but it can handle compressed AC3 (Dolby Digital), as proven by its native apps.
  The goal is to force PipeWire to encode the HDMI audio to AC3.
  The issue is that PipeWire/WirePlumber ignores all attempts to add the iec958.codecs = [ "AC3" ] property. I have tried user-level .lua scripts, system-level .conf overrides in /etc/pipewire, and system-level .conf overrides in /etc/wireplumber. In every case, wpctl inspect says that the property is not being applied or updated.

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