Public bug reported:
Hardware:
- MSI Alpha 17 C7VG, REV:1.0
- PCI subsystem: 1462:13ed
- AMD ACP/ACP3X/ACP6x Audio Coprocessor: 1022:15e2 at 06:00.5
- Realtek ALC274 HDA codec at 06:00.6
Software:
- Ubuntu 24.04
- Linux 7.0.0-31-generic
- PipeWire 1.0.5
Expected result:
The built-in microphone array should appear as an ALSA capture device.
It works normally in Windows 11 on the same laptop.
Actual result:
Linux exposes only the external headset microphone input.
arecord -l:
card 2: Generic_1 [HD-Audio Generic], device 0: ALC274 Analog
/proc/asound/modules:
0 snd_hda_intel
1 snd_hda_intel
2 snd_hda_intel
The ACP device is detected and bound:
snd_rpl_pci_acp6x 0000:06:00.5: enabling device (0000 -> 0002)
However, ACP does not register an ALSA sound card, so no internal DMIC/PDM
capture PCM is available.
The Realtek HDA codec is detected as ALC274. Its autoconfiguration reports:
Mic=0x19
Codec dump identifies node 0x19 as:
[Jack] Mic at Ext Left
This is the external headset microphone jack. The only input port exposed by
PipeWire/pavucontrol is the unplugged headset microphone port:
alsa_input.pci-0000_06_00.6.analog-stereo
Attached:
- alsa-info.txt
- alpha17-internal-mic-report.tar.gz
- Full ALC274 codec dump
- dmesg output
- lspci -nnk output
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 7.0.0-31.31~24.04.1-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: gleb 1889 F.... wireplumber
/dev/snd/controlC0: gleb 1889 F.... wireplumber
/dev/snd/controlC1: gleb 1889 F.... wireplumber
/dev/snd/seq: gleb 1885 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 11 00:06:16 2026
InstallationDate: Installed on 2025-10-02 (343 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64
(20220809.1)
MachineType: Micro-Star International Co., Ltd. Alpha 17 C7VG
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: 07/09/2026
dmi.bios.release: 1.37
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: E17KKAMS.125
dmi.board.asset.tag: Default string
dmi.board.name: MS-17KK
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: REV:1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrE17KKAMS.125:bd07/09/2026:br1.37:svnMicro-StarInternationalCo.,Ltd.:pnAlpha17C7VG:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-17KK:rvrREV1.0:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrN/A:sku17KK.1:pfaAlpha:
dmi.product.family: Alpha
dmi.product.name: Alpha 17 C7VG
dmi.product.sku: 17KK.1
dmi.product.version: REV:1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
** Attachment added: "alpha17-internal-mic-report.tar.gz"
https://bugs.launchpad.net/bugs/2167031/+attachment/5999337/+files/alpha17-internal-mic-report.tar.gz
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https://bugs.launchpad.net/bugs/2167031
Title:
no sound from internal mic MSI Alpha 17 C7VG
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