[BUG]HP Elite x2 G8 Tablet: Mono-Duplicate Left channel on internal speakers (ALC3292 + 2x NXP TFA9894), ALC285 fixup (SSID 103c:0000)

[k0styan3]

Hello,

I am running Ubuntu on an HP Elite x2 G8 Tablet (Intel Tiger Lake platform). The audio system uses a Realtek ALC3292 codec combined with two discrete NXP TFA9894 amplifiers for the internal speakers.
On many distributions, there was no sound at all. On Manjaro, it was the same as on Ubuntu 26.04.

Currently, the internal speakers are not working correctly (routing issue/wrong fixup applied):

1. When testing the LEFT channel, sound comes out of BOTH internal speakers simultaneously.
2. When testing the RIGHT channel, there is absolute silence from the internal speakers.
3. Audio via the headphone jack (wired) and Bluetooth works perfectly in full stereo.

It seems the driver applies a generic ALC285 fixup (SSID 103c:0000) and fails to properly initialize or route the right-channel NXP TFA9894 amplifier via ACPI/I2C.

I have attached all the necessary debug logs, including alsa-info, codec dump, dmesg, and nhlt.bin.

Could you please help with a proper kernel quirk/fixup for this specific hardware configuration? Thank you!

aplay-l.txt

codec_dump.txt

dmesg.txt

alsa-info.txt

nhlt.zip

[k0styan3]

I can disable Secure Boot and test experimental kernels or SOF topologies.I'm ready to provide any logs, command outputs, or anything else needed to fix the sound on this device! Because the sound was simply amazing under Windows 11! And I really miss it.

[bardliao]

@KailangYang Could you take a look? The codec is ALC285

[KailangYang]

This wasn't codec site issue. Driver didn't set 0x17 to mono.

[k0styan3]

This wasn't codec site issue. Driver didn't set 0x17 to mono.

Thanks for your help! Do you mean I wrote the bug report in the wrong place? Where should I write it then? Please tell me!

[KailangYang]

This issue was relate with SPK AMP. It was not own by Realtek and Intel.

[k0styan3]

This issue was relate with SPK AMP. It was not own by Realtek and Intel.

I’m reading through a translator, so forgive me for asking again - where should I turn then if this bug tracker is not for my problem?

[KailangYang]

Yes.

[k0styan3]

Yes.

Where should I write then?