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[Bug 2129566] [NEW] em som / Saída Fictícia no Samsung 550XED (144d:c878) com ALC298 (Falta de patch de topologia SOF

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Public bug reported:

Hardware Affected: Samsung Electronics Co., LTD. 550XED Audio Codec:
Realtek ALC298 Subsystem ID: 144d:c878 Kernel Version: 6.14.0-33-generic
Driver: sof-audio-pci-intel-tgl (Sound Open Firmware)

Summary: O áudio interno (alto-falantes) e o fone de ouvido não
funcionam, sendo detectados apenas como "Dummy Output" ("Saída
Fictícia"). O sistema está usando o driver SOF para o chipset Alder Lake
PCH-P, mas o áudio falha ao inicializar o dispositivo corretamente.

Details: O problema persiste mesmo após a reinstalação do firmware-sof-
signed e tentativas de forçar o driver legado snd-hda-intel com vários
quirks de modelo (model=alc298-samsung, model=samsung-nb).

O log do kernel (dmesg) confirma que o driver SOF está carregando, mas
está usando a topologia genérica: intel/sof-tplg/sof-hda-generic-
idisp-2ch.tplg.

O áudio só funcionará quando o Kernel Linux for corrigido com um patch
de topologia SOF (quirk) específico para o Subsystem ID do Samsung
550XED (144d:c878).

ALSA Information Link (Diagnóstico Completo):
[http://alsa-project.org/db/?f=17aae03a043630a4fa09333c602e943e2d012b0b](http://alsa-project.org/db/?f=17aae03a043630a4fa09333c602e943e2d012b0b)

Nota: Este mesmo problema de áudio ocorreu no Windows 11 (versão 24H2)
antes da migração para o Ubuntu, sugerindo um problema de firmware de
baixo nível.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7 [modified: usr/share/alsa-base/alsa-info.sh]
ProcVersionSignature: Ubuntu 6.14.0-33.33~24.04.1-generic 6.14.11
Uname: Linux 6.14.0-33-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  jean-carlos   3211 F.... wireplumber
 /dev/snd/seq:        jean-carlos   3206 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 22 11:57:49 2025
InstallationDate: Installed on 2025-10-20 (2 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 550XED
PackageArchitecture: all
ProcEnviron:
 LANG=pt_BR.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/03/2025
dmi.bios.release: 5.25
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: P11RGK.050.250403.SX
dmi.board.asset.tag: No Asset Tag
dmi.board.name: NP550XED-KF4BR
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: SGLB434A0G-C01-G001-S0001+10.0.22621
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrP11RGK.050.250403.SX:bd04/03/2025:br5.25:svnSAMSUNGELECTRONICSCO.,LTD.:pn550XED:pvrP11RGK:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP550XED-KF4BR:rvrSGLB434A0G-C01-G001-S0001+10.0.22621:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:skuSCAI-A5A5-A5A5-ADLP-PRGK:
dmi.product.family: Galaxy Book2
dmi.product.name: 550XED
dmi.product.sku: SCAI-A5A5-A5A5-ADLP-PRGK
dmi.product.version: P11RGK
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
modified.conffile..etc.modprobe.d.alsa-base.conf:
 
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2025-10-22T11:57:43.891684

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble wayland-session

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/2129566

Title:
  em som / Saída Fictícia no Samsung 550XED (144d:c878) com ALC298
  (Falta de patch de topologia SOF

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Hardware Affected: Samsung Electronics Co., LTD. 550XED Audio Codec:
  Realtek ALC298 Subsystem ID: 144d:c878 Kernel Version:
  6.14.0-33-generic Driver: sof-audio-pci-intel-tgl (Sound Open
  Firmware)

  Summary: O áudio interno (alto-falantes) e o fone de ouvido não
  funcionam, sendo detectados apenas como "Dummy Output" ("Saída
  Fictícia"). O sistema está usando o driver SOF para o chipset Alder
  Lake PCH-P, mas o áudio falha ao inicializar o dispositivo
  corretamente.

  Details: O problema persiste mesmo após a reinstalação do firmware-
  sof-signed e tentativas de forçar o driver legado snd-hda-intel com
  vários quirks de modelo (model=alc298-samsung, model=samsung-nb).

  O log do kernel (dmesg) confirma que o driver SOF está carregando, mas
  está usando a topologia genérica: intel/sof-tplg/sof-hda-generic-
  idisp-2ch.tplg.

  O áudio só funcionará quando o Kernel Linux for corrigido com um patch
  de topologia SOF (quirk) específico para o Subsystem ID do Samsung
  550XED (144d:c878).

  ALSA Information Link (Diagnóstico Completo):
  [http://alsa-project.org/db/?f=17aae03a043630a4fa09333c602e943e2d012b0b](http://alsa-project.org/db/?f=17aae03a043630a4fa09333c602e943e2d012b0b)

  Nota: Este mesmo problema de áudio ocorreu no Windows 11 (versão 24H2)
  antes da migração para o Ubuntu, sugerindo um problema de firmware de
  baixo nível.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu7 [modified: usr/share/alsa-base/alsa-info.sh]
  ProcVersionSignature: Ubuntu 6.14.0-33.33~24.04.1-generic 6.14.11
  Uname: Linux 6.14.0-33-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jean-carlos   3211 F.... wireplumber
   /dev/snd/seq:        jean-carlos   3206 F.... pipewire
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Oct 22 11:57:49 2025
  InstallationDate: Installed on 2025-10-20 (2 days ago)
  InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 550XED
  PackageArchitecture: all
  ProcEnviron:
   LANG=pt_BR.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  SourcePackage: alsa-driver
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/03/2025
  dmi.bios.release: 5.25
  dmi.bios.vendor: American Megatrends International, LLC.
  dmi.bios.version: P11RGK.050.250403.SX
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: NP550XED-KF4BR
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: SGLB434A0G-C01-G001-S0001+10.0.22621
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrP11RGK.050.250403.SX:bd04/03/2025:br5.25:svnSAMSUNGELECTRONICSCO.,LTD.:pn550XED:pvrP11RGK:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP550XED-KF4BR:rvrSGLB434A0G-C01-G001-S0001+10.0.22621:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:skuSCAI-A5A5-A5A5-ADLP-PRGK:
  dmi.product.family: Galaxy Book2
  dmi.product.name: 550XED
  dmi.product.sku: SCAI-A5A5-A5A5-ADLP-PRGK
  dmi.product.version: P11RGK
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
  modified.conffile..etc.modprobe.d.alsa-base.conf:
   
  mtime.conffile..etc.modprobe.d.alsa-base.conf: 2025-10-22T11:57:43.891684

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