Re: [PATCH] ALSA: hda/realtek - Fix headset mic problem for a HP machine with alc671

Hi  Takashi,

Thank you for your reply.

When booting with plugged headset, the headphone will be muted.

Thanks. &nbsp; ------------------&nbsp;Original&nbsp;------------------ From: &nbsp;"Takashi&nbsp;Iwai"<tiwai@suse.de&gt;; Date: &nbsp;Thu, Mar 10, 2022 09:29 PM To: &nbsp;"huangwenhui"<huangwenhuia@uniontech.com&gt;; Cc: &nbsp;"perex"<perex@perex.cz&gt;; "tiwai"<tiwai@suse.com&gt;; "jeremy.szu"<jeremy.szu@canonical.com&gt;; "hui.wang"<hui.wang@canonical.com&gt;; "wse"<wse@tuxedocomputers.com&gt;; "cam"<cam@neo-zeon.de&gt;; "kailang"<kailang@realtek.com&gt;; "tanureal"<tanureal@opensource.cirrus.com&gt;; "sami"<sami@loone.fi&gt;; "alsa-devel"<alsa-devel@alsa-project.org&gt;; "linux-kernel"<linux-kernel@vger.kernel.org&gt;; Subject: &nbsp;Re: [PATCH] ALSA: hda/realtek - Fix headset mic problem for a HP machine with alc671

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On Thu, 10 Mar 2022 14:03:01 +0100, huangwenhui wrote: &gt; &gt; On a HP 288 Pro G8, the front Mic could not be detected. &gt; &gt; Signed-off-by: huangwenhui <huangwenhuia@uniontech.com&gt;

Thanks for the patch.&nbsp; Most of the changes look OK, but one thing I still don't get:

&gt; + case HDA_FIXUP_ACT_INIT: &gt; + alc_write_coef_idx(codec, 0x19, 0xa054); &gt; + msleep(80); &gt; + snd_hda_codec_write(codec, hp_pin, 0, &gt; + &nbsp;&nbsp;&nbsp; AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);

Why this unconditional unmute is required for fixing the mic problem?

Takashi