linux-kernel - input/i8042: Malfunctioning brightness keys on HP Elite Dragonfly G2

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Message-ID: <20220629094314.b7xmfb3xccj7vs6v@ic-alex-elitebook>
Date:   Wed, 29 Jun 2022 10:43:14 +0100
From:   Alex Dewar <alex.dewar@....co.uk>
To:     dmitry.torokhov@...il.com, tiwai@...e.de
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: input/i8042: Malfunctioning brightness keys on HP Elite Dragonfly G2

Hi,

I'm running Linux 5.18.7 on an HP Elite Dragonfly G2 laptop, which seems
to use the i8042 driver. Mostly things seem to work (including hotkeys)
except that the increase/decrease brightness keys instead send the "mic
mute" keycode. (The *actual* mic mute key works fine.)

Any ideas? Do we need to add a quirk?

Best,
Alex