Re: [REGRESSION] Speaker pop/chirp on Meteor Lake ALC287 (17aa:231e) -- 6.12.73 to 6.12.85

On Thu, 28 May 2026 15:38:54 +0200,
Mike Karcic wrote:
> 
> I did test 46c862f5419e on 6.12.90. Chirp still present.
> 
> I'm also on a ThinkPad X1 Carbon Gen 12 with ALC287 (17aa:231e),
> same as the original reporter. The fix resolved it for them but
> not for me.
> 
> Only a full revert of 630fbc6e870e resolves the issue.
> 
> Verification on the running kernel:
> 
>   $ grep -c "dis_coefs" sound/pci/hda/patch_realtek.c
>   2
> 
>   $ grep -c "en_coefs" sound/pci/hda/patch_realtek.c
>   0
> 
>   $ sed -n '/alc287_alc1318_playback_pcm_hook/,/^}/p' sound/pci/hda/patch_realtek.c
>   static void alc287_alc1318_playback_pcm_hook(struct hda_pcm_stream *hinfo,
>                                      struct hda_codec *codec,
>                                      struct snd_pcm_substream *substream,
>                                      int action)
>   {
>           switch (action) {
>           case HDA_GEN_PCM_ACT_OPEN:
>                   alc_write_coefex_idx(codec, 0x5a, 0x00, 0x954f);
>                   break;
>           case HDA_GEN_PCM_ACT_CLOSE:
>                   alc_write_coefex_idx(codec, 0x5a, 0x00, 0x554f);
>                   break;
>           }
>   }
> 
> Happy to test further patches.

Just to be sure, could you verify that you've tested really the
patched kernel, e.g. by adding a debug print, etc?
If yes and the problem is seen even with the patch, try to comment out
  alc_process_coef_fw(codec, dis_coefs);
and confirm that this fixes the problem.


Takashi