linux-kernel - Re: [PATCH 1/4] ALSA: hda/realtek: fix mute/micmute LEDs for HP 855 G8

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Date:   Wed, 12 Jan 2022 10:45:46 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Alexander Sergeyev <sergeev917@...il.com>
Cc:     Jeremy Szu <jeremy.szu@...onical.com>, tiwai@...e.com,
        "moderated list:SOUND" <alsa-devel@...a-project.org>,
        Kailang Yang <kailang@...ltek.com>,
        open list <linux-kernel@...r.kernel.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jian-Hong Pan <jhp@...lessos.org>,
        Hui Wang <hui.wang@...onical.com>,
        PeiSen Hou <pshou@...ltek.com>
Subject: Re: [PATCH 1/4] ALSA: hda/realtek: fix mute/micmute LEDs for HP 855 G8

On Tue, 11 Jan 2022 20:52:29 +0100,
Alexander Sergeyev wrote:
> 
> Hello,
> 
> On Thu, May 20, 2021 at 01:03:53AM +0800, Jeremy Szu wrote:
> >The HP EliteBook 855 G8 Notebook PC is using ALC285 codec which needs
> >ALC285_FIXUP_HP_MUTE_LED fixup to make it works. After applying the
> >fixup, the mute/micmute LEDs work good.
> 
> I've recently got HP EliteBook 855 G8 and it happens that neither
> micmute LED nor speakers work (except rare cases, more on that later)
> in 5.16.0. The corresponding ALC285_FIXUP_HP_MUTE_LED fixup is
> definitely applied (verified by adding a printk into
> alc285_fixup_hp_mute_led).
> 
> What is the most interesting, both micmute LED and speakers do work on
> rare boots. I've written some scripts to pick up sound from speakers
> using a known-good USB microphone. Out of 709 boots today only 16
> ended up with working micmute LED and speakers.
> 
> Is there anything I can do to help with debugging of this problem?
> 
> Initially reported at https://bugzilla.kernel.org/show_bug.cgi?id=215466

The problem is about the built-in drivers, or do you see the very same
problem even with modules?  AFAIK, quite a few AMD platforms tend to
have some issues with various devices showing initialization problems
at the early boot.  Just reloading / rebinding the device later often
helps.


Takashi