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

[Mike Karcic]

Yes, I can confirm the patched kernel is running, and commenting out that line fixes the problem completely.

Below is output with the added debug lines as requested:

$ uname -r
6.12.90-debug-no-discoefs

$ sudo dmesg | grep -i "alc287_alc1318"
[  453.823528] snd_hda_codec_realtek ehdaudio0D0: alc287_alc1318_playback_pcm_hook called action=0
[  453.871577] snd_hda_codec_realtek ehdaudio0D0: alc287_alc1318_playback_pcm_hook called action=1
[  459.605379] snd_hda_codec_realtek ehdaudio0D0: alc287_alc1318_playback_pcm_hook called action=2
[  459.605497] snd_hda_codec_realtek ehdaudio0D0: alc287_alc1318_playback_pcm_hook called action=3

$ grep -n -A5 -B2 "alc_process_coef_fw.*dis_coefs" sound/pci/hda/patch_realtek.c
7918-           return;
7919-   alc_update_coef_idx(codec, 0x10, 1<<11, 1<<11);
7920:   /* alc_process_coef_fw(codec, dis_coefs); */ /* commented out for testing */
7921-   alc_process_coef_fw(codec, coefs);
7922-   spec->power_hook = alc287_s4_power_gpio3_default;
7923-   spec->gen.pcm_playback_hook = alc287_alc1318_playback_pcm_hook;
7924-}



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On Thursday, May 28th, 2026 at 10:07 AM, Takashi Iwai <tiwai@xxxxxxx> wrote:

> 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
>