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Como Ativar os Alto-falantes do Samsung Galaxy Book4 Pro no Linux
Bernardo Leb · 2026-05-17 · via DEV Community

Bernardo Lebron

O Problema

Se você tem um Samsung Galaxy Book4 Pro rodando Linux, provavelmente já percebeu que os alto-falantes internos não funcionam. O fone de ouvido funciona normalmente, mas as caixinhas ficam completamente mudas — independente da distro ou do kernel.

Passei horas procurando solução em fóruns, repositórios e documentações. A maioria das soluções encontradas era genérica ou desatualizada. Esse post documenta o que realmente funciona.


Por que Acontece

O Galaxy Book4 Pro usa o codec Realtek ALC298 combinado com amplificadores MAX98390 conectados via barramento I2C. O kernel Linux detecta o codec normalmente, mas nunca inicializa o amplificador MAX98390 — resultado: caixinhas completamente mudas.

No Windows, a Samsung instala um driver DSP proprietário que inicializa e controla esse amp automaticamente. No Linux, esse driver não existe.


Diagnóstico

Antes de qualquer coisa, confirme que seu hardware é afetado:

cat /proc/asound/card0/codec#0 | grep -i "codec\|subsystem"

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Se aparecer Codec: Realtek ALC298 e um Subsystem ID começando com 0x144d (Samsung), você está no lugar certo.

Confirme também que o amp não está sendo inicializado:

sudo dmesg | grep -i "max98\|cs35\|speaker\|amp"

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Se não aparecer nenhuma linha sobre MAX98390, o amp nunca foi acordado.


A Solução

Graças ao trabalho incrível do @Andycodeman e da comunidade open source, existe um driver DKMS que resolve o problema. O fix instala o driver MAX98390, cria um serviço systemd que inicializa o amp a cada boot, e funciona automaticamente após reiniciar.

Antes de instalar, verifique:

# Secure Boot precisa estar desativado
mokutil --sb-state

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Comando de instalação (Ubuntu/Zorin/Mint/Pop!_OS):

curl -sL https://github.com/Andycodeman/samsung-galaxy-book-linux-fixes/archive/refs/heads/main.tar.gz | tar xz && cd samsung-galaxy-book-linux-fixes-main/speaker-fix && sudo ./install.sh

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Após a instalação, teste sem reiniciar:

sudo systemctl start max98390-hda-i2c-setup.service

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Se o som sair, reinicie para confirmar que persiste no boot:

sudo reboot

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Melhorando a Qualidade com EasyEffects

O driver inicializa o amp, mas o som fica mais "cru" do que no Windows (onde a Samsung usa DSP proprietário). Para melhorar, instale o EasyEffects:

sudo apt install -y easyeffects calf-plugins

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Na aba Efeitos → Saída, adicione:

  • Equalizador — reforce médios (1kHz~4kHz) e reduza graves excessivos (32Hz~250Hz)
  • Limitador com threshold em -3dB — evita distorção nos picos
  • Compressor com ratio 4:1 e attack 5ms — suaviza batidas fortes

Configure o EasyEffects para rodar em segundo plano: ⋯ → Iniciar como Serviço


Testado em

Modelo Distro Kernel Status
Galaxy Book4 Pro (NP940XGK) Zorin OS 18.1 6.17.0-23-generic ✅ Funcionando

Créditos

  • Andycodeman — DKMS packaging, scripts de instalação, detecção dinâmica I2C
  • Kevin Cuperus — Código original do driver MAX98390 (upstream PR #5616)
  • Google Redrix (Chromebook) — Blobs de firmware DSP extraídos do mesmo hardware MAX98390

👉 Repositório: https://github.com/Andycodeman/samsung-galaxy-book-linux-fixes