Re:

[Syed Saba Kareem <syed.sabakareem@amd.com>]

Hi Mark,

We will investigate this issue.
Could you please log a ticket in Bugzilla for easy tracking.

Thanks,
Syed Saba Kareem.

On 8/11/26 13:18, Mark Nelson wrote:
>
> 	
> You don't often get email from marknelson84@googlemail.com. Learn why 
> this is important <https://aka.ms/LearnAboutSenderIdentification>
> 	
>
>
>   Internal microphone not detected on Acer Nitro ANV16S-41 (AMD ACP6.3
>   / Pink Sardine) — missing ACPI DMIC device object
>
>
>     Summary
>
> The internal microphone array does not work on the Acer Nitro 
> ANV16S-41 (AMD Ryzen 7 260, "Phoenix3" APU, ACP6.3/"Pink Sardine" 
> audio coprocessor, PCI ID |1022:15e2| rev 63). Root cause has been 
> isolated to the BIOS/ACPI layer: |sound/soc/amd/ps/pci-ps.c|'s 
> |get_acp63_device_config()| looks for a child ACPI device at address 
> |ACP63_DMIC_ADDR| (|2|) under the ACP PCI device's ACPI scope, 
> carrying an |acp-audio-device-type| |_DSD| property equal to 
> |ACP_DMIC_DEV| (|2|). On this laptop's firmware, *no ACPI device 
> exists at that address at all* — every sibling audio sub-device (HDA 
> analog, Bluetooth SCO, USB) is correctly declared with the expected 
> |_DSD| properties, but the PDM/DMIC controller object is simply absent.
>
> As a result |is_dmic_dev| is never set, no platform device is created 
> for |snd-ps-pdm-dma| / |snd-soc-ps-mach| to bind to, and userspace has 
> no capture device for the internal mic array — only the 
> (non-functional, see below) legacy HDA analog capture path is visible 
> to PipeWire/ALSA.
>
> This looks like a firmware omission rather than a kernel bug per se, 
> but is filed here because a DMI-based quirk fallback (as already 
> exists for the |renoir| driver, see |rn_acp_quirk_table| in 
> |sound/soc/amd/renoir/rn-pci-acp3x.c|) would let Linux work around it, 
> matching the precedent set for similarly-affected models (see "Related 
> reports" below).
>
>
>     System information
>
>
> 	
> Laptop 	Acer Nitro ANV16S-41
> BIOS version 	v1.01 (shipped); *also reproduced on v1.14*, the latest 
> available (AMD PI update, 2026/07/28) — see "BIOS update tested" below
> CPU 	AMD Ryzen 7 260 w/ Radeon 780M Graphics ("Phoenix3", |1002:1900| 
> rev b6)
> Audio Coprocessor 	AMD ACP/ACP3X/ACP6x Audio Coprocessor, |1022:15e2| 
> rev 63 (ACP6.3 / "Pink Sardine")
> Bound kernel driver 	|snd_pci_ps| (|sound/soc/amd/ps/pci-ps.c|)
> OS 	Ubuntu 24.04 LTS
> Kernel 	|7.0.0-28-generic|
> |sys_vendor| 	Acer
> |product_name| 	Nitro ANV16S-41
> |product_version| 	V1.01
> |board_vendor| 	/(please fill in: |cat /sys/class/dmi/id/board_vendor|)/
>
>
>     Expected behavior
>
> The internal microphone array should appear as a working ALSA/PipeWire 
> capture source, as it does under Windows on the same hardware.
>
>
>     Actual behavior
>
>   * No ACP-based capture device is ever created.
>   * PipeWire/WirePlumber falls back to the legacy HDA analog input
>     ("Family 17h/19h HD Audio Controller Analog Stereo" / ALC245),
>     which is itself non-functional for capture on this hardware — raw
>     |arecord| testing against it (with PipeWire/WirePlumber stopped)
>     returns either a fixed, bit-for-bit-identical noise pattern across
>     independent takes, or a saturated near-DC signal, depending on
>     prior pin-configuration state. This confirms that pin is not wired
>     to a real microphone element and is a red herring/legacy stub,
>     separate from the ACP root cause below.
>   * |snd-ps-pdm-dma| and |snd-soc-ps-mach| load cleanly with no
>     errors, but create no card (0 refcount, no new entry in
>     |/proc/asound/cards|), because |pci-ps.c| never creates the
>     platform device they need.
>
>
>     Root cause (isolated via ACPI table decompile)
>
> Kernel source (|sound/soc/amd/ps/acp63.h|):
>
> c
> |#define ACP63_DMIC_ADDR 2 #define ACP_DMIC_DEV 2|
>
> |sound/soc/amd/ps/pci-ps.c|, |get_acp63_device_config()|:
>
> c
> |dmic_dev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), 
> ACP63_DMIC_ADDR, 0); if (dmic_dev) { if 
> (!acpi_dev_get_property(dmic_dev, "acp-audio-device-type", 
> ACPI_TYPE_INTEGER, &obj) && obj->integer.value == ACP_DMIC_DEV) 
> is_dmic_dev = true; }|
>
> Full ACPI dump (|acpidump -b| + |iasl -d|) of this laptop's DSDT/SSDTs 
> shows the ACP's ACPI scope (|\_SB.PCI0.GP17.ACP_|) declares exactly 
> six child devices, at |_ADR| values 1, 3, 4, 5, 6, 7:
>
> |Device (HDA0) Name (_ADR, One) // = 1, has _DSD: 
> acp-audio-device-type = 1 Device (I2SC) Name (_ADR, 0x03) // no _DSD 
> at all Device (BTSC) Name (_ADR, 0x04) // has _DSD: 
> acp-audio-device-type = 4 Device (SDWC) Name (_ADR, 0x05) // no _DSD 
> Device (SDWS) Name (_ADR, 0x06) // no _DSD Device (USBS) Name (_ADR, 
> 0x07) // has _DSD: acp-audio-device-type = 7|
>
> *There is no device at |_ADR 0x02|.* The PDM/DMIC controller object 
> the driver expects is entirely missing from the firmware's ACPI 
> namespace — not merely missing a property on an existing device, but 
> absent as an object. Every other audio sub-device (HDA, Bluetooth SCO, 
> USB) is declared correctly and completely; only the DMIC entry is omitted.
>
>
>     BIOS update tested
>
> Between filing this report, BIOS was updated from the as-shipped v1.01 
> to the latest available, *v1.14* (2026/07/28, "Updates AMD PI 
> version"). The ACPI tables were re-dumped and re-decompiled after the 
> update: *no change*. The same three |_DSD| declarations (HDA0, BTSC, 
> USBS) are present, |_ADR 0x02| is still absent, and |arecord|/|wpctl| 
> behavior is unchanged. This suggests the missing device object is 
> written by Acer's own board-level ASL rather than anything AMD's 
> AGESA/PI blob controls, so an AMD PI update alone is not expected to 
> fix it.
>
>
>     Suggested fix
>
> Add a DMI-based quirk fallback to |get_acp63_device_config()| in 
> |sound/soc/amd/ps/pci-ps.c|, mirroring the existing |dmi_system_id| 
> mechanism already used in |sound/soc/amd/renoir/rn-pci-acp3x.c| 
> (|rn_acp_quirk_table|), to force |is_dmic_dev = true| for this DMI 
> match (|sys_vendor| "Acer", |product_name| "Nitro ANV16S-41") when 
> ACPI declaration is absent. This is the same category of fix already 
> applied upstream for comparable AMD ACP-generation laptops (see below).
>
> Related / precedent reports
>
>   * Arch Linux forum, [Solved] Built-in microphone not working on Acer
>     Nitro ANV15-41 (same OEM family, one ACP generation earlier —
>     |snd_pci_acp6x|/|yc| driver, DMI-quirk-based; ultimately fixed by
>     a kernel update that added the necessary quirk):
>     https://bbs.archlinux.org/viewtopic.php?id=306867
>     <https://bbs.archlinux.org/viewtopic.php?id=306867>
>   * LKML patch adding a |yc|-driver DMI quirk for a different affected
>     model (MSI Bravo 15 C7UCX):
>     https://lkml.iu.edu/hypermail/linux/kernel/2503.1/10229.html
>     <https://lkml.iu.edu/hypermail/linux/kernel/2503.1/10229.html>
>   * Fedora Discussion, same symptom on a sibling Acer Nitro AN16-41 /
>     ANV15-41-R2VJ model:
>     https://discussion.fedoraproject.org/t/built-in-microphone-is-not-working-on-acer-nitro-an16-41-on-fedora-42-gnome/151554
>     <https://discussion.fedoraproject.org/t/built-in-microphone-is-not-working-on-acer-nitro-an16-41-on-fedora-42-gnome/151554>
>
>
>     Diagnostics performed
>
>  1. Confirmed no process holds |/dev/snd/*| unexpectedly (|fuser -v|).
>  2. Confirmed raw ALSA capture off the legacy HDA path (with PipeWire
>     and WirePlumber fully stopped) is non-functional: bit-identical
>     noise across independent takes, then a saturated DC signal after
>     reverting an |hda-jack-retask| override — neither is real acoustic
>     signal.
>  3. Verified ALSA mixer levels (|amixer|, |alsamixer|) are unmuted and
>     at maximum gain/boost throughout.
>  4. Confirmed via |lspci -k| / |lsmod| / |modinfo| that |snd_pci_ps|
>     binds to the ACP PCI device (|1022:15e2| rev 63) with no SOF
>     dependency.
>  5. Confirmed |snd-ps-pdm-dma| and |snd-soc-ps-mach| load without
>     error but create no platform device / sound card, via |modprobe|,
>     |lsmod| refcounts, |/proc/asound/cards|, and PCI unbind/rebind
>     with elevated |printk| level and live |dmesg| monitoring.
>  6. Full ACPI DSDT + all SSDT tables dumped (|acpidump -b|) and
>     decompiled (|iasl -d|), confirming the missing |_ADR 0x02| device
>     as described above.
>  7. Repeated steps 4–6 after updating BIOS from v1.01 to v1.14; no change.
>
>
> Alsa info script
> https://alsa-project.org/db/?f=b35ba5a7c4cc84669c7bdaad5a3d01c4ee68af79
>
> sudo dmesg | grep snd
> [    3.040295] snd_hda_intel 0000:01:00.1: enabling device (0000 -> 0002)
> [    3.040443] snd_hda_intel 0000:01:00.1: Disabling MSI
> [    3.040454] snd_hda_intel 0000:01:00.1: Handle vga_switcheroo audio 
> client
> [    3.040812] snd_hda_intel 0000:65:00.1: enabling device (0000 -> 0002)
> [    3.040921] snd_hda_intel 0000:65:00.1: Handle vga_switcheroo audio 
> client
> [    3.040991] snd_hda_intel 0000:65:00.6: enabling device (0000 -> 0002)
> [    3.060213] snd_pci_ps 0000:65:00.5: enabling device (0000 -> 0002)
> [    3.063800] snd_hda_codec_alc269 hdaudioC2D0: ALC245: picked fixup 
>  for PCI SSID 1025:0000
> [    3.064274] snd_hda_codec_alc269 hdaudioC2D0: autoconfig for 
> ALC245: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
> [    3.064278] snd_hda_codec_alc269 hdaudioC2D0:  speaker_outs=0 
> (0x0/0x0/0x0/0x0/0x0)
> [    3.064280] snd_hda_codec_alc269 hdaudioC2D0:    hp_outs=1 
> (0x21/0x0/0x0/0x0/0x0)
> [    3.064282] snd_hda_codec_alc269 hdaudioC2D0:    mono: mono_out=0x0
> [    3.064283] snd_hda_codec_alc269 hdaudioC2D0:    inputs:
> [    3.064285] snd_hda_codec_alc269 hdaudioC2D0:      Internal Mic=0x12
> [    3.064287] snd_hda_codec_alc269 hdaudioC2D0:      Internal Mic=0x13
> [    5.213121] snd_hda_intel 0000:65:00.1: bound 0000:65:00.0 (ops 
> amdgpu_dm_audio_component_bind_ops [amdgpu])
>
> wpctl status
> PipeWire 'pipewire-0' [1.0.5, mdn@SerangoonHippo, cookie:3037145564]
>  └─ Clients:
>         32. pipewire                            [1.0.5, 
> mdn@SerangoonHippo, pid:3212]
>         34. WirePlumber                         [1.0.5, 
> mdn@SerangoonHippo, pid:3209]
>         35. WirePlumber [export]                [1.0.5, 
> mdn@SerangoonHippo, pid:3209]
>         52. GNOME Volume Control Media Keys     [1.0.5, 
> mdn@SerangoonHippo, pid:3681]
>         53. gnome-shell                         [1.0.5, 
> mdn@SerangoonHippo, pid:3534]
>         54. GNOME Shell Volume Control          [1.0.5, 
> mdn@SerangoonHippo, pid:3534]
>         55. xdg-desktop-portal                  [1.0.5, 
> mdn@SerangoonHippo, pid:4098]
>         56. GNOME Settings                      [1.0.5, 
> mdn@SerangoonHippo, pid:5076]
>         71. Firefox                             [1.0.5, 
> mdn@SerangoonHippo, pid:4384]
>         72. Terminal                            [1.0.5, 
> mdn@SerangoonHippo, pid:6049]
>         73. Mutter                              [1.0.5, 
> mdn@SerangoonHippo, pid:3534]
>         74. speech-dispatcher-dummy             [1.0.5, 
> mdn@SerangoonHippo, pid:6907]
>         82. wpctl                               [1.0.5, 
> mdn@SerangoonHippo, pid:7385]
>
> Audio
>  ├─ Devices:
>  │      46. Family 17h/19h HD Audio Controller  [alsa]
>  │      47. HDA NVidia                          [alsa]
>  │      48. Rembrandt Radeon High Definition Audio Controller [alsa]
>  │
>  ├─ Sinks:
>  │  *   49. Family 17h/19h HD Audio Controller Analog Stereo [vol: 1.00]
>  │
>  ├─ Sink endpoints:
>  │
>  ├─ Sources:
>  │  *   50. Family 17h/19h HD Audio Controller Analog Stereo [vol: 1.00]
>  │
>  ├─ Source endpoints:
>  │
>  └─ Streams:
>         57. GNOME Settings
>              59. input_FL        < ALC245 Analog:monitor_FL [active]
>              60. monitor_FL
>              61. input_FR        < ALC245 Analog:monitor_FR [active]
>              62. monitor_FR
>         58. GNOME Settings
>              63. input_FL        < ALC245 Analog:capture_FL [active]
>              64. monitor_FL
>              65. input_FR        < ALC245 Analog:capture_FR [active]
>              66. monitor_FR
>         79. speech-dispatcher-dummy
>              76. output_FL       > ALC245 Analog:playback_FL [paused]
>              78. output_FR       > ALC245 Analog:playback_FR [paused]
>
> Video
>  ├─ Devices:
>  │
>  ├─ Sinks:
>  │
>  ├─ Sink endpoints:
>  │
>  ├─ Sources:
>  │
>  ├─ Source endpoints:
>  │
>  └─ Streams:
>
> Settings
>  └─ Default Configured Node Names:
>          0. Audio/Sink  alsa_output.pci-0000_65_00.6.pro-output-0
>          1. Audio/Source  alsa_input.pci-0000_65_00.6.analog-stereo
>
> sudo lspci -nnvv -s 65:00.5
>
> 65:00.5 Multimedia controller [0480]: Advanced Micro Devices, Inc. 
> [AMD] ACP/ACP3X/ACP6x Audio Coprocessor [1022:15e2] (rev 63)
> Subsystem: Acer Incorporated [ALI] ACP/ACP3X/ACP6x Audio Coprocessor 
> [1025:1969]
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
> Stepping- SERR- FastB2B- DisINTx-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- 
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin B routed to IRQ 137
> IOMMU group: 25
> Region 0: Memory at bc780000 (32-bit, non-prefetchable) [size=256K]
> Region 2: Memory at 7e20000000 (64-bit, prefetchable) [size=8M]
> Capabilities: [48] Vendor Specific Information: Len=08 <?>
> Capabilities: [50] Power Management version 3
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
> Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
> Capabilities: [64] Express (v2) Endpoint, MSI 00
> DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1 unlimited
> ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0W
> DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
> RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
> MaxPayload 128 bytes, MaxReadReq 512 bytes
> DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- TransPend-
> LnkCap: Port #0, Speed 16GT/s, Width x16, ASPM L0s L1, Exit Latency 
> L0s <64ns, L1 <1us
> ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
> LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed 16GT/s, Width x16
> TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
> DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP- LTR-
> 10BitTagComp+ 10BitTagReq- OBFF Not Supported, ExtFmt+ EETLPPrefix+, 
> MaxEETLPPrefixes 1
> EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
> FRS- TPHComp- ExtTPHComp-
> AtomicOpsCap: 32bit- 64bit- 128bitCAS-
> DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- 
> 10BitTagReq- OBFF Disabled,
> AtomicOpsCtl: ReqEn-
> LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- 
> EqualizationPhase1-
> EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
> Retimer- 2Retimers- CrosslinkRes: unsupported
> Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
> Address: 0000000000000000  Data: 0000
> Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1 
> Len=010 <?>
> Capabilities: [2a0 v1] Access Control Services
> ACSCap: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- 
> EgressCtrl- DirectTrans-
> ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- 
> EgressCtrl- DirectTrans-
> Kernel driver in use: snd_pci_ps
> Kernel modules: snd_pci_acp3x, snd_rn_pci_acp3x, snd_pci_acp5x, 
> snd_pci_acp6x, snd_acp_pci, snd_rpl_pci_acp6x, snd_pci_ps, 
> snd_sof_amd_renoir, snd_sof_amd_rembrandt, snd_sof_amd_vangogh, 
> snd_sof_amd_acp63, snd_sof_amd_acp70
>