Re: possible issue with ALSA: hda/realtek: Use codec SSID matching for Lenovo devices

[Takashi Iwai <tiwai@xxxxxxx>]

On Wed, 22 Jan 2025 01:58:16 +0100,
Samantha Glocker wrote:
> 
> Hi, I'm a kernel maintainer from nobara and ASUS-Linux.
> 
> I've bifurcated an issue with sound on Lenovo Legion laptop(s)
> starting from mainline 6.12.5, verified on Fedora proper, Nobara, and
> CachyOS.
> 
> From the changelog,
> https://patch.msgid.link/20241008120233.7154-4-tiwai@xxxxxxx looks
> like a likely candidate due to touching TAS2781 / TIA2781.
> 
> The issue will possibly affect sound on any or all Lenovo Legion Gen 8 and 9.
> 
> The obvious difference in dmesg on my Legion Pro 7 Gen 8 (16ARX8H) on
> 6.12.5, is the following line is completely missing:
> [    4.761665] snd_hda_codec_realtek hdaudioC1D0: bound
> i2c-TIAS2781:00 (ops tas2781_hda_comp_ops
> [snd_hda_scodec_tas2781_i2c])
> 
> This suggests the TI amplifier is never identified.

What's the exact problem?  Is it a regression?  Any original report on
the bug tracker or such?


thanks,

Takashi