From: Krishna Chomal <krishna.chomal108@gmail.com>
To: Piyush Kumar <aryanbabupiyushbabu@gmail.com>
Cc: platform-driver-x86@vger.kernel.org
Subject: Re: [BUG] hp-wmi: Mute and mic-mute LEDs not supported on HP Laptop 15-fc0xxx (board 8DC9)
Date: Tue, 6 Oct 2026 10:33:59 +0530 [thread overview]
Message-ID: <asR_wY3ZGJztPywo@archlinux> (raw)
In-Reply-To: <CAC604MZ_ssUJO+BFjvDXxTCt_uUGveQeH-TmrBdvJrGGBGYh9w@mail.gmail.com>
On Mon, Oct 05, 2026 at 06:01:15AM +0000, Piyush Kumar wrote:
>Hi,
>
>I am writing to report an issue where the speaker mute LED (F5) and
>mic-mute LED (F8) are non-functional under Linux on the HP Laptop
>15-fc0xxx (Motherboard DMI: 8DC9), although audio muting itself works
>fine and the LEDs function properly under Windows.
>
>This issue is tracked on Kernel Bugzilla under Bug 222044.
>
>Hardware Environment:
>- Laptop: HP Laptop 15-fc0xxx
>- Motherboard DMI: 8DC9
>- Subsystem ID: 103c:8dc9
>- BIOS Version: F.25
>- Audio Codec: Realtek ALC236 (103c:8dc9)
>- Kernel: 7.2.6-zen2-1-zen x86_64
>
>Diagnostic Summary:
>1. ALC236 Codec Control Ruled Out:
> Direct hda-verb coefficient writes (node 0x20, verbs 0x500/0x400 on
>indices 0x0b, 0x19, 0x34) return 0x0 with no effect on the LEDs,
>indicating the LEDs are electrically decoupled from the Realtek codec.
>2. The LEDs appear to be handled via ACPI / EC under hp-wmi, but lack
>the necessary quirk/table definitions for board ID 8DC9.
Hi Piyush Kumar,
As stated earlier, hp-wmi does NOT handle LEDs and there is no necessary
quick/table definition for any board in this driver. Please post this
hda-verb diagnostic summary on your Bugzilla bug 222044 where Zhang Heng
has asked, he may be able to guide you best.
>Diagnostic logs and WMI/DMI details are available on the ticket.
>Please let me know if any further dumps or testing of patches are
>needed.
>
>Best regards,
>Piyush
prev parent reply other threads:[~2026-10-06 5:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-05 6:01 [BUG] hp-wmi: Mute and mic-mute LEDs not supported on HP Laptop 15-fc0xxx (board 8DC9) Piyush Kumar
2026-10-06 5:03 ` Krishna Chomal [this message]
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