Audio Failure on Acer Aspire AS4738 – Intel 5 Series HD Audio (Linux Mint / Kernel 6.x)

LUBM2
(usa Outra)

Enviado em 20/01/2026 - 22:57h

ello everyone, could someone help me with this audio issue?

Audio Failure on Acer Aspire AS4738 – Intel 5 Series HD Audio (Linux Mint / Kernel 6.x)

Hardware Specifications
- Laptop model: Acer Aspire AS4738
- CPU: Intel Core i3 (1st generation, Arrandale)
- Chipset: Intel 5 Series / 3400 Series
- Audio controller: Intel HD Audio (HDA)
- Codec: Realtek (exact model not exposed by ALSA)
- RAM: 6 GB
- Storage: SSD
- Firmware: Legacy BIOS (non-UEFI)

Operating Systems Tested
- Linux Mint 21.x (Cinnamon/MATE)
- Kernel: 6.14.0-37-generic
- Audio stack tested: PipeWire + WirePlumber and PulseAudio
- Windows (same machine)
- Audio works normally (internal speakers functional)

Problem Description
On Linux Mint 21.x, no real audio output device is detected.
The system exposes only a null / dummy output, regardless of audio stack.

Observed outputs:
auto_null PipeWire / PulseAudio
module-null-sink.c
SUSPENDED

No ALSA PCM devices are created.

Initial Detection Results
inxi -A:
Device-1: Intel 5 Series/3400 Series High Definition Audio
driver: snd_hda_intel
API: ALSA
Server: PipeWire 1.0.5 (later PulseAudio)

ALSA Layer Diagnostics
aplay -l:
No sound cards listed

lsmod | grep snd:
snd_hda_intel present

Audio Stack Troubleshooting Performed

1. PipeWire / WirePlumber
- User configuration fully reset
- Services restarted
Result: still only auto_null

2. PulseAudio
- PipeWire removed
- PulseAudio reinstalled from scratch
Result: auto_null module-null-sink.c SUSPENDED

ALSA Codec Forcing Attempts
Tested via /etc/modprobe.d/alsa-base.conf:
- model=acer
- model=acer-aspire
- model=basic
- model=auto
- model=acer power_save=0 probe_mask=1

None resulted in ALSA device creation.

IRQ / ACPI / MSI Workarounds
Module parameters:
options snd-hda-intel enable_msi=0 power_save=0

GRUB parameters:
acpi_osi=Linux irqpoll

No effect.

BIOS Checks
- Onboard Audio enabled
- Disabled and re-enabled to force re-enumeration
- No effect

Cross-Validation
- Windows boots with fully working audio
- Confirms no hardware failure

Key Observation
The issue appears only on modern Linux kernels (6.x).
snd_hda_intel loads but fails to initialize codec / PCM devices.

I am not experienced with Linux. Could someone please help me with this issue? Has anyone else encountered the same problem? Thank you.