linux-kernel - [PATCH] Input: i8042 - add quirk for ASUS Zenbook UX425QA

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Message-Id: <20260122013957.11184-1-alec.jiang@gmail.com>
Date: Wed, 21 Jan 2026 20:39:57 -0500
From: feng <alec.jiang@...il.com>
To: dtor@...l.ru
Cc: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	feng <alec.jiang@...il.com>
Subject: [PATCH] Input: i8042 - add quirk for ASUS Zenbook UX425QA_UM425QA

The ASUS Zenbook UX425QA_UM425QA fails to initialize the keyboard after a
cold boot.

A quirk already exists for "ZenBook UX425", but some Zenbooks report "Zenbook" with a lowercase 'b'.
Since DMI matching is case-sensitive, the existing quirk is not applied to these "extra special" Zenbooks.

Testing confirms that this model needs the same quirks as the ZenBook UX425 variants.

Signed-off-by: feng <alec.jiang@...il.com>
---
 drivers/input/serio/i8042-acpipnpio.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/input/serio/i8042-acpipnpio.h b/drivers/input/serio/i8042-acpipnpio.h
index 654771275..b34d922a9 100644
--- a/drivers/input/serio/i8042-acpipnpio.h
+++ b/drivers/input/serio/i8042-acpipnpio.h
@@ -115,6 +115,16 @@ static const struct dmi_system_id i8042_dmi_quirk_table[] __initconst = {
 		},
 		.driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_NEVER)
 	},
+	/* ASUS Zenbook UX425QA_UM425QA
+	 * Some Zenbooks report "Zenbook" with a lowercase b.
+	 */
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Zenbook UX425QA_UM425QA"),
+		},
+		.driver_data = (void *)(SERIO_QUIRK_PROBE_DEFER | SERIO_QUIRK_RESET_NEVER)
+	},
 	{
 		/* ASUS ZenBook UX425UA/QA */
 		.matches = {
-- 
2.34.1