Public bug reported:
### Summary
After upgrading the kernel from `7.0.0-30-generic` to `7.0.0-31-generic`
(Ubuntu 24.04), internal speaker audio stopped working completely on the ASUS
Zenbook UX3402ZA.
### Hardware details
- Machine: ASUS Zenbook UX3402ZA_UX3402ZA (SSID: 1043:1e02)
- Audio Controller: Intel Corporation Alder Lake PCH-P High Definition Audio
Controller [8086:51c8]
- Codec / Amps: Realtek ALC294 + 2x Cirrus Logic CS35L41 amplifiers over SPI
(`spi0-CSC3551:00`)
### What worked before (Kernel 7.0.0-30-generic)
In kernel `7.0.0-30-generic`, the SPI bus initialized without issues, and both
CS35L41 amplifiers successfully loaded their firmware and calibrated:
```text
cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: Firmware Loaded - Type: spk-prot,
Gain: 17
cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: CS35L41 Bound - SSID: 10431E02
cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Firmware Loaded - Type: spk-prot,
Gain: 17
cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: CS35L41 Bound - SSID: 10431E02
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-7.0.0-31-generic 7.0.0-31.31~24.04.1
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/controlC0: pau 3125 F.... pipewire
pau 3129 F.... wireplumber
/dev/snd/pcmC0D0p: pau 3125 F...m pipewire
/dev/snd/seq: pau 3125 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 7 21:57:41 2026
InstallationDate: Installed on 2026-04-20 (140 days ago)
InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210)
MachineType: ASUSTeK COMPUTER INC. Zenbook UX3402ZA_UX3402ZA
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-31-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-7.0.0-31-generic N/A
linux-backports-modules-7.0.0-31-generic N/A
linux-firmware 20240318.git3b128b60.0ubuntu3.1
SourcePackage: linux-hwe-7.0
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/15/2022
dmi.bios.release: 5.25
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: UX3402ZA.305
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX3402ZA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.ec.firmware.release: 3.5
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrUX3402ZA.305:bd06/15/2022:br5.25:efr3.5:svnASUSTeKCOMPUTERINC.:pnZenbookUX3402ZA_UX3402ZA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX3402ZA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct31:cvr1.0:sku:pfaZenbook:
dmi.product.family: Zenbook
dmi.product.name: Zenbook UX3402ZA_UX3402ZA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux-hwe-7.0 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2166713
Title:
[Regression] Audio broken in 7.0.0-31-generic: SLUB GFP_DMA allocation
failure causes cs35l41 SPI transfer failure on ASUS Zenbook UX3402ZA
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