linux-kernel - Re: [PATCH] ALSA: hda/realtek: add quirk for Acer Nitro ANV15-51

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Message-ID: <87bjhy0xd1.wl-tiwai@suse.de>
Date: Mon, 09 Feb 2026 16:07:06 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Zhang Heng <zhangheng@...inos.cn>
Cc: perex@...ex.cz,
	tiwai@...e.com,
	sbinding@...nsource.cirrus.com,
	kailang@...ltek.com,
	chris.chiu@...onical.com,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda/realtek: add quirk for Acer Nitro ANV15-51

On Mon, 09 Feb 2026 14:41:49 +0100,
Zhang Heng wrote:
> 
> fix mute/micmute LEDs and headset microphone for Acer Nitro ANV15-51.
> 
> [ The headset microphone issue is solved by Kailang]
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=220279
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Zhang Heng <zhangheng@...inos.cn>
> ---
> There is a small issue now, the mute LED stays on when I mute the
> laptop microphone, unmute the headphone microphone, and set the
> headphone mic as default. Is it possible to fix this?

Can LED be controlled dynamically by writing to a sysfs file in
/sys/class/leds/*? e.g.

  % cat /sys/class/leds/platform::micmute/brightness
  1
  % echo 0 > /sys/class/leds/platform::micmute/brightness

If the direct write changes the actual LED status, it's not about the
sound driver problem, but possibly some plumbing in user-space via
UCM, etc.


thanks,

Takashi