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

On Thu, 28 May 2026 20:27:30 +0200,
Mike Karcic wrote:
> 
> 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-}

Hm, then the previous fix doesn't seem working, obviously.
Kailang, could you check this in your side?

Maybe we should apply the AMP-silence-detection disablement
conditionally to certain models?


thanks,

Takashi

> 
> 
> 
> Sent with Proton Mail secure email.
> 
> On Thursday, May 28th, 2026 at 10:07 AM, Takashi Iwai <[email protected]> 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
> >