Issue Report: Internal Speaker Not Working on ASUS A3402 After Clean Install (Deepin OS 25 & Other OSes)

I am experiencing an audio issue on my ASUS A3402WB All-in-One PC (Intel Core i7 12th Gen) after performing a clean installation of Deepin OS 25 (kernel 6.12). The internal speaker does not produce any sound, although the volume indicators and sound graphs are active. Audio works fine through a headset.

This issue is not limited to Deepin OS—it also occurs on Windows and other Linux distributions after a clean install. This suggests that ASUS relies on proprietary OEM drivers that are not bundled with standard operating system images.

System Information:

• Model: ASUS A3402WB (All-in-One)
• CPU: Intel Core i7 12th Gen
• OS: Deepin OS 25 (kernel 6.12), also tested on Windows 11 and other Linux distros
• Audio Driver (Linux): sof-audio-pci-intel-tgl (likely used)
• Audio Server: PipeWire (PulseAudio also detected)

Symptoms:

• Internal speaker produces no sound
• Headset audio works normally
• Volume is not muted at system or application level
• Audio graphs and indicators show activity
• alsamixer shows active volume levels
• pactl list short sinks does not list internal speaker as an active sink
• dmesg logs suggest possible SOF firmware loading errors

Additional Notes: After a clean install of any OS (Windows or Linux), all ASUS OEM drivers are removed, including the internal audio driver. The internal speaker is not recognized by default, indicating that ASUS A3402 requires custom topology or firmware patches.

Windows installs generic Realtek or Intel drivers, which are insufficient to activate the internal speaker. Linux systems may lack the correct .tplg topology files or kernel parameters needed for proper detection.

Troubleshooting Steps Taken:

1. Changed default sink using pactl: pactl set-default-sink
2. Installed SOF firmware manually: sudo apt install firmware-sof-signed
3. Disabled PulseAudio to avoid conflicts with PipeWire: systemctl –user mask pulseaudio.socket systemctl –user stop pulseaudio.service
4. Added kernel parameter to disable DMIC detection: GRUB_CMDLINE_LINUX_DEFAULT=“quiet splash snd_hda_intel.dmic_detect=0” sudo update-grub
5. Verified mixer settings via alsamixer and checked logs using journalctl

Diagnostic Logs Available: I can provide the following logs upon request:

• journalctl -b -0 (system log)
• journalctl -k -b -0 (kernel log)
• Output of fastfetch
• Output of pactl list short sinks
• Screenshot of alsamixer

Request for Assistance: I kindly request from the Deepin OS team to:

• Provide a patch or configuration to enable internal speaker detection on ASUS A3402
• Ensure that compatible SOF firmware and topology files are included in Deepin OS images
• Offer documentation or guidance for users of AIO systems who face similar hardware compatibility issues

This issue affects not only Deepin OS but also other operating systems, and may require collaboration with upstream kernel or SOF developers.

Thank you for your attention.