Public bug reported:
Hardware:
Laptop: ASUS EXPERTBOOK B9403CVAR_B9403CVAR
Codec: Realtek ALC294 (Vendor Id: 0x10ec0294)
Subsystem Id: 0x10431e93
GPU/HDMI codec also present: Intel Raptor Lake P HDMI (0x8086281f)
Software:
Ubuntu 24.04 (Noble)
Kernel: (see attached kernel.txt)
PipeWire on by default
Using legacy HDA driver (snd-hda-intel), SOF disabled via dsp_driver=1
Symptoms:
- "Built-in Audio" appears and analog-stereo sink is present in `pactl list
short sinks`.
- No sound from internal speakers.
- Internal microphone does not capture audio.
- HDMI audio works.
- Windows on the same laptop has working speakers and mic (hardware OK).
What I tried:
- Verified devices in `aplay -l` (ALC294 appears as HDA Intel PCH).
- Set analog sink as default in PipeWire/PulseAudio.
- Unmuted/raised volumes in alsamixer (Speaker/Master/Headphone).
- Switched from SOF to legacy HDA driver (`options snd-intel-dspcfg
dsp_driver=1`).
- Tried model quirks: asus-zenbook, alc294-laptop, dell-headset-multi,
lenovo-yoga, asus-nb-wmi.
- Restarted services; tried OEM kernel.
- hdajackretask overrides for likely pins (0x17, 0x14, 0x1a, 0x21) – no
effect.
- hda-verb EAPD/pin enables – no effect.
- Firmware verb patches (alc294-sound-patch.fw) – no effect.
Expectation:
- Internal speakers and internal microphone should work out of the box.
- It appears a DMI-based UCM/ALSA quirk for this exact ASUS model is missing.
Request:
- Please add a quirk/UCM profile for ASUS EXPERTBOOK B9403CVAR (Subsystem Id
0x10431e93) so that internal speakers and microphone are routed and functional.
Attachments:
- alsa_info.txt
- kernel.txt
- ubuntu_version.txt
- dmi.txt
- codec_ids.txt
** Affects: alsa-ucm-conf (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "alsa_info.txt"
https://bugs.launchpad.net/bugs/2125484/+attachment/5911034/+files/alsa_info.txt
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https://bugs.launchpad.net/bugs/2125484
Title:
ASUS ExpertBook B9403CVAR (ALC294): no internal speakers or microphone
on Ubuntu 24.04
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