From: Takashi Iwai <tiwai@suse.de>
To: Hui Wang <hui.wang@canonical.com>
Cc: alsa-devel@alsa-project.org, kailang@realtek.com, stable@vger.kernel.org
Subject: Re: [PATCH] ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged
Date: Mon, 21 Sep 2020 10:25:33 +0200 [thread overview]
Message-ID: <s5hzh5jpmde.wl-tiwai@suse.de> (raw)
In-Reply-To: <20200914065118.19238-1-hui.wang@canonical.com>
On Mon, 14 Sep 2020 08:51:18 +0200,
Hui Wang wrote:
>
> We found a Mic detection issue on many Lenovo laptops, those laptops
> belong to differnt models and they have different audio design like
> internal mic connects to the codec or PCH, they all have this problem,
> the problem is if plugging a headset before powerup/reboot the
> machine, after booting up, the headphone could be detected but Mic
> couldn't. If we plug out and plug in the headset, both headphone and
> Mic could be detected then.
>
> Through debugging we found the codec on those laptops are same, it is
> alc257, and if we don't disable the 3k pulldown in alc256_shutup(),
> the issue will be fixed. So far there is no pop noise or power
> consumption regression on those laptops after this change.
>
> Cc: Kailang Yang <kailang@realtek.com>
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Hui Wang <hui.wang@canonical.com>
Applied now. Thanks.
Takashi
prev parent reply other threads:[~2020-09-21 8:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-14 6:51 [PATCH] ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged Hui Wang
2020-09-17 15:53 ` Sasha Levin
2020-09-21 8:25 ` Takashi Iwai [this message]
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