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

[Takashi Iwai <tiwai@suse.de>]

On Wed, 22 Jan 2025 08:21:26 +0100,
Takashi Iwai wrote:
> 
> 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@suse.de 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?

... and if it's a regression, please give alsa-info.sh outputs from
both working and non-working cases.  Run the script with --no-upload
option and attach the outputs.


Takashi