https://bugzilla.kernel.org/show_bug.cgi?id=221226
Bug ID: 221226
Summary: ASUS Zenbook S16 (UM5606GA) - Audio not working -
Incorrect acp-audio-config-flag (0x10 instead of
0x00) for ACP 7.0
Product: ACPI
Version: 2.5
Hardware: AMD
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: BIOS
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Hardware Information:
- Laptop: ASUS Zenbook S16 UM5606GA
- CPU: AMD Ryzen AI 9 HX 370 (Strix Point)
- Audio Coprocessor: ACP 7.0 (PCI ID 1022:15e2, rev 70)
- Audio Setup: SoundWire-based with Cirrus Logic CS42L43 codec and 4x CS35L56
amplifiers.
Description of the Problem:
The internal audio (speakers and jack) does not work on Linux kernels (tested
up to 6.19.6). The system defaults to a "Dummy Output".
Upon investigation, the issue is caused by the ACPI tables (specifically
SSDT10) setting the acp-audio-config-flag property to 0x10
(FLAG_AMD_LEGACY_ONLY_DMIC). This causes the snd_pci_ps (SoundWire) driver to
reject the device, while the snd_acp_pci (Legacy) driver binds to it but fails
to find a matching ASoC machine driver for this platform.
Evidence/Workaround:
I have successfully fixed the audio by applying an ACPI SSDT override.
- Original ACPI SSDT: acp-audio-config-flag = 0x10
- Patched ACPI SSDT: acp-audio-config-flag = 0x00 (and incremented Revision
from 1 to 2)
Once the flag is set to 0x00, the snd_pci_ps driver correctly initializes the
SoundWire bus, discovers the CS42L43 codec and the 4x CS35L56 amplifiers, and
the audio works perfectly.
Could a DMI-based quirk be added to the kernel (sound/soc/amd/acp-config.c or
similar) to force FLAG_AMD_SOUNDWIRE mode for the "Zenbook S16 UM5606GA"
regardless of the BIOS-provided ACPI flag?
DMI Strings:
- System Vendor: ASUSTeK COMPUTER INC.
- Product Name: Zenbook S16 UM5606GA
- Board Name: UM5606GA
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