linux-kernel - Re: [PATCH v2 1/1] ALSA: hda/realtek: fix speakers and micmute on HP 855 G8

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Date:   Mon, 17 Jan 2022 08:12:08 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Alexander Sergeyev <sergeev917@...il.com>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Jeremy Szu <jeremy.szu@...onical.com>,
        Werner Sembach <wse@...edocomputers.com>,
        Hui Wang <hui.wang@...onical.com>,
        Cameron Berkenpas <cam@...-zeon.de>,
        Kailang Yang <kailang@...ltek.com>, Sami Loone <sami@...ne.fi>,
        Elia Devito <eliadevito@...il.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] ALSA: hda/realtek: fix speakers and micmute on HP
 855 G8

On Sun, Jan 16, 2022 at 12:26 AM Alexander Sergeyev
<sergeev917@...il.com> wrote:
>
> On Sat, Jan 15, 2022 at 11:47:40PM +0800, Kai-Heng Feng wrote:
> > > Note that the device can boot up with working speakers and micmute LED
> > > without this patch, but the success rate would be quite low (order of
> > > 16 working boots across 709 boots) at least for the built-in drivers
> > > scenario. This also means that there are some timing issues during early
> > > boot and this patch is a workaround.
> >
> > Does this issue happen to warm boot (reboot) or cold boot?
>
> The issue is definitely not limited to warm boots only. I can confirm cold
> boots with no sound and also warm boots with functioning sound. With this in
> mind, the provided numbers (16 good boots across 709 boots) are largely coming
> from reboots since the testing was scripted and driven by SSH.

If this issue also happens to cold boot it seems to be a BIOS issue.

>
> > If the issue only happen to warm boot, please try reverting commit
> > 9d3fcb28f9b9 "Revert "PM: ACPI: reboot: Use S5 for reboot"".
> > Many HP systems requires it to have a functional reboot.
>
> Interesting. I haven't noticed anything breaking with reboots on this
> particular system (at least so far).

If possible, please still give that commit a try.

Kai-Heng