[PATCH] Input: i8042 - add Fujitsu Lifebook E5411 to i8042 quirk table

[PATCH] Input: i8042 - add Fujitsu Lifebook E5411 to i8042 quirk table

[Szilard Fabian]

In the initial boot stage the integrated keyboard of Fujitsu Lifebook E5411
refuses to work and it's not possible to type for example a dm-crypt
passphrase without the help of an external keyboard.

i8042.nomux kernel parameter resolves this issue but using that a PS/2
mouse is detected. This input device is unused even when the i2c-hid-acpi
kernel module is blacklisted making the integrated ELAN touchpad
(04F3:308A) not working at all.

Since the integrated touchpad is managed by the i2c_designware input
driver in the Linux kernel and you can't find a PS/2 mouse port on the
computer I think it's safe to not use the PS/2 mouse port at all.

Signed-off-by: Szilard Fabian <szfabian@bluemarch.art>
---
I think the same patch could be applied to E4411, E4511 and E5511 too
but sadly I can't test this theory. But these computers use the same
UEFI updates so I think there isn't much difference in input devices.
---
 drivers/input/serio/i8042-acpipnpio.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/input/serio/i8042-acpipnpio.h b/drivers/input/serio/i8042-acpipnpio.h
index 028e45bd050b..3f73fa69b8ce 100644
--- a/drivers/input/serio/i8042-acpipnpio.h
+++ b/drivers/input/serio/i8042-acpipnpio.h
@@ -618,6 +618,14 @@ static const struct dmi_system_id i8042_dmi_quirk_table[] __initconst = {
 		},
 		.driver_data = (void *)(SERIO_QUIRK_NOMUX)
 	},
+	{
+		/* Fujitsu Lifebook E5411 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU CLIENT COMPUTING LIMITED"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E5411"),
+		},
+		.driver_data = (void *)(SERIO_QUIRK_NOAUX)
+	},
 	{
 		/* Gigabyte M912 */
 		.matches = {
-- 
2.42.0

Re: [PATCH] Input: i8042 - add Fujitsu Lifebook E5411 to i8042 quirk table

[Dmitry Torokhov]

On Wed, Oct 04, 2023 at 01:17:54AM +0000, Szilard Fabian wrote:
> In the initial boot stage the integrated keyboard of Fujitsu Lifebook E5411
> refuses to work and it's not possible to type for example a dm-crypt
> passphrase without the help of an external keyboard.
> 
> i8042.nomux kernel parameter resolves this issue but using that a PS/2
> mouse is detected. This input device is unused even when the i2c-hid-acpi
> kernel module is blacklisted making the integrated ELAN touchpad
> (04F3:308A) not working at all.
> 
> Since the integrated touchpad is managed by the i2c_designware input
> driver in the Linux kernel and you can't find a PS/2 mouse port on the
> computer I think it's safe to not use the PS/2 mouse port at all.
> 
> Signed-off-by: Szilard Fabian <szfabian@bluemarch.art>

Applied, thank you.

-- 
Dmitry