Public bug reported:
ASUS ExpertBook P3 PM3606CHA
Ubuntu 26.04
Kernel: 7.0.0-31-generic
Audio codec:
Realtek ALC256
Vendor ID: 0x10ec0256
Subsystem ID: 0x10433501
Symptoms:
- Internal speakers produce no sound.
- 3.5 mm headphones also produce no sound.
- PipeWire detects Ryzen HD Audio Controller Speaker normally.
- ALSA exposes ALC256 Analog playback device.
- speaker-test runs normally but produces no audible sound.
- Headphone jack detection does not work:
pin 0x21 GET_PIN_SENSE returns 0x0 both unplugged and plugged.
- Speaker pin 0x14 has PIN_WIDGET_CONTROL=0x40.
- EAPD on pin 0x14 is already 0x02.
- Manually enabling codec GPIO2 (mask/direction/data = 0x04)
does not restore speaker audio.
- No CS35L41/TAS2781/etc external amplifier is detected by ACPI.
dmesg:
ALC256: picked fixup (pin match)
autoconfig for ALC256:
line_outs=1 (0x14) type:speaker
hp_outs=1 (0x21)
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-31-generic 7.0.0-31.31
ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 15 09:46:56 2026
InstallationDate: Installed on 2026-09-14 (0 days ago)
InstallationMedia: Ubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64
(20260826)
MachineType: ASUS ASUS EXPERTBOOK PM3606CHA
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-31-generic
root=UUID=7b60115e-0170-41c8-8f2f-181cb8f8c35d ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/20/2026
dmi.bios.release: 3.4
dmi.bios.vendor: ASUSTeK COMPUTER INC. (Licensed by AMI, LLC.)
dmi.bios.version: PM3606CHA.304
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: PM3606CHA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.ec.firmware.release: 3.21
dmi.modalias:
dmi:bvnASUSTeKCOMPUTERINC.(LicensedbyAMI,LLC.):bvrPM3606CHA.304:bd03/20/2026:br3.4:efr3.21:svnASUS:pnASUSEXPERTBOOKPM3606CHA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnPM3606CHA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:pfaASUSEXPERTBOOK:
dmi.product.family: ASUS EXPERTBOOK
dmi.product.name: ASUS EXPERTBOOK PM3606CHA
dmi.product.version: 1.0
dmi.sys.vendor: ASUS
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2167288
Title:
No internal speaker or 3.5mm headphone audio on ASUS ExpertBook
PM3606CHA - Realtek ALC256 subsystem 1043:3501
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