Re: [PATCH] HID: multitouch: add quirks for Lenovo Yoga Book 9i
From: Jiri Kosina
Date: Sat Jan 10 2026 - 04:04:01 EST
On Mon, 17 Nov 2025, Brian Howard wrote:
> Add required quirks for Lenovo Yoga Book 9i Gen 8 to Gen 10 models,
> including a new quirk providing for custom input device naming and
> dropping erroneous InRange reports.
>
> The Lenovo Yoga Book 9i is a dual-screen laptop, with a single composite
> USB device providing both touch and tablet interfaces for both screens.
> All inputs report through a single device, differentiated solely by report
> numbers. As there is no way for udev to differentiate the inputs based on
> USB vendor/product ID or interface numbers, custom naming is required to
> match against for downstream configuration. A firmware bug also results
> in an erroneous InRange message report (with everything other than X/Y
> as 0) being received after the stylus leaves proximity, blocking later
> touch events.
>
> Signed-off-by: Brian Howard <blhoward2@xxxxxxxxx>
> Tested-by: Brian Howard <blhoward2@xxxxxxxxx>
> Reported-by: Andrei Shumailov <gentoo1993@xxxxxxxxx>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220386
Applied, thanks.
--
Jiri Kosina
SUSE Labs