No sound from internal speakers on Acer Aspire AL16-31P (Realtek ALC269VC, likely amp issue)

[nicolas2019alcubo]

Laptop: Acer Aspire AL16-31P
CPU: Intel Alder Lake
Audio codec: Realtek ALC269VC
Audio controller: HDA Intel PCH

Problem:
Internal speakers produce no sound on Linux. Audio system appears functional but output is silent.

Tested distributions:

• Fedora 43 (kernel 6.17.1)
• Ubuntu 25.10
• EndeavourOS (Arch-based)

Observed behavior:

• Speakers detected as "Built-in Audio"
• Audio plays (no errors), but no sound is heard
• Headphones and HDMI output work (if tested, confirm)
• pactl shows sink in SUSPENDED or IDLE state
• alsamixer shows normal levels

Diagnostics:
aplay -l shows:
card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog

Manual test:
aplay -D plughw:0,0 /usr/share/sounds/alsa/Front_Center.wav
→ no sound output

Attempted fixes:

• Disabled Auto-Mute Mode
• Forced analog-stereo profile
• Installed alsa-sof-firmware
• Tested multiple kernels and distros

Conclusion:
Likely missing support or initialization sequence for internal speaker amplifier (smart amp).

[nicolas2019alcubo]

I have Fedora

[nicolas2019alcubo]

???