Public bug reported:
HDMI audio stopped working after upgrading from Ubuntu 24.04 to 26.04.
The issue is in the WirePlumber/PipeWire layer — ALSA and the AMD HDMI
driver work correctly (speaker-test directly to ALSA produces sound),
but PipeWire fails to route audio through the HDMI sink.
Hardware: Lenovo IdeaPad Slim 3 15ABR8, AMD Ryzen 7 7730U, AMD Renoir
HDMI/DP Audio Controller
Kernel: 7.0.0-10-generic
PipeWire: 1.6.2 + WirePlumber
Symptoms:
- HDMI sink is created and shows as RUNNING in pactl
- Default sink set to HDMI correctly
- speaker-test -D plughw:0,7 produces sound (ALSA layer works)
- paplay via PipeWire produces no sound
- Worked correctly on Ubuntu 24.04 with the same hardware
The sink transitions to RUNNING state but audio never reaches the
physical HDMI output. This points to a WirePlumber policy regression
in activating the HDMI audio route.
pactl list sinks short output:
57 alsa_output.pci-0000_04_00.6.analog-stereo PipeWire s32le 2ch
48000Hz RUNNING
174 alsa_output.pci-0000_04_00.1.hdmi-stereo-extra1 PipeWire s32le 2ch
48000Hz RUNNING
wpctl status shows HDMI sink correctly detected as ID 55.
Default sink confirmed via pactl info as HDMI sink.
Volume at 100%, not muted.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: alsa-base 1.0.25+dfsg-0ubuntu9
ProcVersionSignature: Ubuntu 7.0.0-10.10-generic 7.0.0-rc4
Uname: Linux 7.0.0-10-generic x86_64
ApportVersion: 2.33.1-0ubuntu7
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed May 6 20:26:16 2026
InstallationDate: Installed on 2025-10-11 (207 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: LENOVO 82XM
PackageArchitecture: all
ProcEnviron:
LANG=pt_PT.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: alsa-driver
Symptom: audio
UpgradeStatus: Upgraded to resolute on 2026-04-29 (7 days ago)
dmi.bios.date: 02/03/2026
dmi.bios.release: 1.41
dmi.bios.vendor: LENOVO
dmi.bios.version: KYCN41WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad Slim 3 15ABR8
dmi.ec.firmware.release: 1.33
dmi.modalias:
dmi:bvnLENOVO:bvrKYCN41WW:bd02/03/2026:br1.41:efr1.33:svnLENOVO:pn82XM:pvrIdeaPadSlim315ABR8:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrIdeaPadSlim315ABR8:skuLENOVO_MT_82XM_BU_idea_FM_IdeaPadSlim315ABR8:pfaIdeaPadSlim315ABR8:
dmi.product.family: IdeaPad Slim 3 15ABR8
dmi.product.name: 82XM
dmi.product.sku: LENOVO_MT_82XM_BU_idea_FM_IdeaPad Slim 3 15ABR8
dmi.product.version: IdeaPad Slim 3 15ABR8
dmi.sys.vendor: LENOVO
** Affects: wireplumber (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2151748
Title:
AMD HDMI audio not working with PipeWire/WirePlumber on Ubuntu 26.04
(regression from 24.04)
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