Re: [BUG] hda/tas2781: ASUS ROG Xbox Ally X audio issues with default firmware

[Matthew Schwartz <matthew.schwartz@linux.dev>]

On 12/3/25 5:47 PM, Matthew Schwartz wrote:
> Hello,
> 
> I have an ASUS ROG Xbox Ally X which uses hda/tas2781 for the speaker amplifiers. I am splitting this out into a new thread based on the suggestion from [1] to fix the remaining issues with the device's audio separately. 
> 
> I built a kernel from tags/sound-6.19-rc1 in tiwai/sound and included [2], which seemed potentially relevant to the issue that I describe below.
> 
> By default, my system loads /usr/lib/firmware/ti/audio/tas2781/TAS2XXX13840.bin.zst. With this firmware file, any sound above the 70% volume limit range starts to become distorted and frequently drop out from either one or both speakers. I've included an alsa-info.sh report with this default firmware at [3].
> 
> If I run sudo mv /usr/lib/firmware/ti/audio/tas2781/TAS2XXX13841.bin.zst /usr/lib/firmware/ti/audio/tas2781/TAS2XXX13840.bin.zst and force the other firmware file for Xbox Ally models, my speakers work up to 100% without any of the drop outs I experience on the default firmware. I've included an alsa-info.sh report with this renamed firmware at [4].

Hmm, I did just boot into Windows to confirm which firmware blob loads, and it looks like Windows also uses TAS2XXX13840 for my unit. So the driver doesn't appear to be loading the wrong firmware on Linux...

> 
> I took an acpidump at [5] and extracted the dsdt table at [6]. Please let me know if there's any additional information I can provide from the device to further debug the sound issues with the default selected firmware.
> 
> Thanks,
> Matt
> 
> [1]: https://lore.kernel.org/linux-sound/87zf8jesp0.wl-tiwai@suse.de/
> [2]: https://lore.kernel.org/all/20251126141434.11110-1-baojun.xu@ti.com/
> [3]: https://alsa-project.org/db/?f=840337cab11f6aa70cf48b15d55ac45e4027ff41
> [4]: https://alsa-project.org/db/?f=6e482f72765d89520ea171f15641228bcadefcf0
> [5]: https://gist.githubusercontent.com/matte-schwartz/d7ff3c857b45cca197f3d3adc16df0bc/raw/2e3267b8d1a9d619ecd8157e4da426be756b6497/acpidump.txt
> [6]: https://gist.githubusercontent.com/matte-schwartz/4042dcd3779c3738af60536a9d4050d6/raw/5227717c6d40a2dc4012b95f7fefc6cd50ba784d/dsdt.dsl