linux-kernel - Re: [PATCH v10 00/11] HID: asus: Fix ASUS ROG Laptop's Keyboard backlight handling

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Message-ID: <d169655b-4e15-fab6-0ce8-7a6bfd6a47a5@linux.intel.com>
Date: Wed, 7 Jan 2026 12:42:43 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Antheas Kapenekakis <lkml@...heas.dev>, Kelsios <K3lsios@...ton.me>
cc: platform-driver-x86@...r.kernel.org, linux-input@...r.kernel.org, 
    LKML <linux-kernel@...r.kernel.org>, Jiri Kosina <jikos@...nel.org>, 
    Benjamin Tissoires <bentiss@...nel.org>, 
    Corentin Chary <corentin.chary@...il.com>, 
    "Luke D . Jones" <luke@...nes.dev>, Hans de Goede <hansg@...nel.org>, 
    Denis Benato <benato.denis96@...il.com>
Subject: Re: [PATCH v10 00/11] HID: asus: Fix ASUS ROG Laptop's Keyboard
 backlight handling

On Tue, 9 Dec 2025, Antheas Kapenekakis wrote:
> On Tue, 9 Dec 2025 at 10:17, Ilpo Järvinen
> <ilpo.jarvinen@...ux.intel.com> wrote:
> > On Sat, 6 Dec 2025, Antheas Kapenekakis wrote:
> > > On Sat, 6 Dec 2025 at 00:03, Antheas Kapenekakis <lkml@...heas.dev> wrote:
> > > > On Fri, 5 Dec 2025 at 23:13, Kelsios <K3lsios@...ton.me> wrote:
> > > > >
> > > > > I would like to report a regression affecting keyboard backlight brightness control on my ASUS ROG Zephyrus G16 (model GU605CW).
> > > > >
> > > > > Using kernel 6.17.9-arch1-1.1-g14 with the latest HID ASUS patchset v10, keyboard *color* control works correctly, but *brightness* control no longer responds at all. The issue is reproducible on every boot. This problem is not present when using patchset v8, where both color and brightness work as expected.
> > > > >
> > > > > Important detail: the issue occurs even **without** asusctl installed, so it must be within the kernel HID/WMI handling and is unrelated to userspace tools.
> > > > >
> > > > > Output of dmesg is available here [1], please let me know if any additional information is required.
> > > > >
> > > > > Thank you for your time and work on supporting these ASUS laptops.
> > > > >
> > > > > Best regards,
> > > > > Kelsios
> > > > >
> > > > > [1] https://pastebin.com/ZFC13Scf
> > > >
> > > > [ 1.035986] asus 0003:0B05:19B6.0001: Asus failed to receive handshake ack: -32
> > > >
> > > > Oh yeah, asus_kbd_init no longer works with spurious inits so it broke
> > > > devices marked with QUIRK_ROG_NKEY_LEGACY
> > > >
> > > > There are three ways to approach this. One is to ignore the error...
> > > > second is to drop the quirk... third is to check for the usages for ID1, ID2...
> > > >
> > > > I would tend towards dropping the ID2 init and ignoring the error for
> > > > ID1... Unless an EPIPE would cause the device to close
> > >
> > > Benjamin correctly caught the deviation
> >
> > BTW, we want to record this knowledge also into the changelog so that the
> > next person who'd want to make the check stricter does not need to guess
> > whether it was based on a real observed problem or mere guessing there
> > could be a problem.
> 
> If we keep the spurious inits, the stricter check will catch them and
> throw errors. This is problematic.
> 
> Kelsios, you have a device that allegedly would not work without those
> inits. Perhaps you could try removing the legacy quirk from your
> device and see if everything is ok?
> 
> If it is, then we have a tested device and a case for removing the
> legacy quirk altogether

Hi all,

Is there any progress on this?

-- 
 i.