Public bug reported:
Hardware:
Lenovo ThinkBook 16 G7+ AKP
Product name: 21TJ
System board: LNVNB161216
OS:
Ubuntu 26.04.1 LTS
Kernel: 7.0.0-38-generic
Audio server: PipeWire 1.6.2
Session manager: WirePlumber 0.5.13
Problem:
The internal microphone and speakers cannot work simultaneously.
With the Hi-Fi profile, the speakers work but the internal
digital microphone produces no audible signal.
With the Pro Audio profile, the microphone works but the
speakers stop working.
The AMD ACP PDM capture device is detected by ALSA as
acppdmmach, device 0 (dmic-hifi-0). Direct ALSA capture
using S32_LE at 48000 Hz completes, but the recording is silent.
The Realtek ALC257 audio codec is also detected.
The built-in microphone and speakers worked correctly on
the same laptop under Linux Mint 22.3.
Hardware:
AMD ACP audio coprocessor [1022:15e2]
AMD Ryzen HD Audio Controller [1022:15e3]
Realtek ALC257 codec
This may be an AMD ACP/PDM microphone driver or audio
configuration compatibility issue. The exact cause is unknown.
Expected result:
The internal microphone and speakers should work
simultaneously using the normal Hi-Fi audio profile.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: alsa-base 1.0.25+dfsg-0ubuntu9
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: ilya 1902 F.... wireplumber
/dev/snd/controlC1: ilya 1902 F.... wireplumber
/dev/snd/controlC0: ilya 1902 F.... wireplumber
/dev/snd/seq: ilya 1890 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Fri Oct 16 02:11:29 2026
InstallationDate: Installed on 2026-10-15 (0 days ago)
InstallationMedia: Kubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64
(20260826.1)
MachineType: LENOVO 21TJ
PackageArchitecture: all
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: No upgrade log present (probably fresh install)
dmi.bios.date: 10/09/2025
dmi.bios.release: 1.20
dmi.bios.vendor: LENOVO
dmi.bios.version: RPCN20WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76577 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: ThinkBook 16 G7+ AKP
dmi.ec.firmware.release: 1.20
dmi.modalias:
dmi:bvnLENOVO:bvrRPCN20WW:bd10/09/2025:br1.20:efr1.20:svnLENOVO:pn21TJ:pvrThinkBook16G7+AKP:rvnLENOVO:rnLNVNB161216:rvrSDK0T76577WIN:cvnLENOVO:ct10:cvrThinkBook16G7+AKP:skuLENOVO_MT_21TJ_BU_idea_FM_ThinkBook16G7+AKP:pfaThinkBook16G7+AKP:
dmi.product.family: ThinkBook 16 G7+ AKP
dmi.product.name: 21TJ
dmi.product.sku: LENOVO_MT_21TJ_BU_idea_FM_ThinkBook 16 G7+ AKP
dmi.product.version: ThinkBook 16 G7+ AKP
dmi.sys.vendor: LENOVO
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2171027
Title:
Lenovo ThinkBook 16 G7+ AKP (21TJ): internal PDM microphone and
speakers cannot work simultaneously
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/2171027/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
