Public bug reported:
Internal microphone not detected on ASUS ExpertBook PM1503CDA with
Realtek ALC256.
Ubuntu 24.04.4 LTS
Kernel 6.17.0-35-generic
Codec: Realtek ALC256
ALSA component: HDA:10ec0256,10433d50,00100002
The system exposes only analog-input-headset-mic / Headset Mic=0x19.
The internal microphone is not listed as an available input source.
PipeWire shows only alsa_input.pci-0000_04_00.6.analog-stereo routed to
analog-input-headset-mic, with no internal mic port.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.17.0-35-generic 6.17.0-35.35~24.04.1
ProcVersionSignature: Ubuntu 6.17.0-35.35~24.04.1-generic 6.17.13
Uname: Linux 6.17.0-35-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 3 10:05:03 2026
InstallationDate: Installed on 2026-05-21 (13 days ago)
InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210)
MachineType: ASUSTeK COMPUTER INC. ASUS EXPERTBOOK PM1503CDA
ProcEnviron:
LANG=fr_FR.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.17.0-35-generic
root=UUID=2f1b08fd-f2be-4020-9671-78833f1f75ee ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.17.0-35-generic N/A
linux-backports-modules-6.17.0-35-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.27
SourcePackage: linux-hwe-6.17
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/16/2026
dmi.bios.release: 5.24
dmi.bios.vendor: ASUSTeK COMPUTER INC. (Licensed by AMI, LLC.)
dmi.bios.version: PM1503CDA.305
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: PM1503CDA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnASUSTeKCOMPUTERINC.(LicensedbyAMI,LLC.):bvrPM1503CDA.305:bd01/16/2026:br5.24:svnASUSTeKCOMPUTERINC.:pnASUSEXPERTBOOKPM1503CDA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnPM1503CDA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:
dmi.product.family: ASUS EXPERTBOOK
dmi.product.name: ASUS EXPERTBOOK PM1503CDA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux-hwe-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
** Attachment added: "Diagnostic_micro_ASUS.tar.gz"
https://bugs.launchpad.net/bugs/2155127/+attachment/5975161/+files/Diagnostic_micro_ASUS.tar.gz
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https://bugs.launchpad.net/bugs/2155127
Title:
Internal microphone not detected on ASUS ExpertBook PM1503CDA with
Realtek ALC256.
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