* [PATCH] i2c: acpi: Force ASUE140D touchpads to 100 kHz
@ 2026-10-04 10:59 Harinn via B4 Relay
2026-10-04 12:04 ` Mika Westerberg
0 siblings, 1 reply; 2+ messages in thread
From: Harinn via B4 Relay @ 2026-10-04 10:59 UTC (permalink / raw)
To: Andi Shyti, Mika Westerberg; +Cc: linux-i2c, linux-acpi, linux-kernel, Harinn
From: Harinn <prinn.dev@pm.me>
The ASUE140D touchpad on the ASUS Zenbook UX3404VC (BIOS UX3404VC.303)
starts lagging shortly after boot when the bus runs at the 400 kHz the
DSDT asks for, and only recovers after rebinding i2c-hid. Forcing
100 kHz fixes it.
Signed-off-by: Harinn <prinn.dev@pm.me>
---
drivers/i2c/i2c-core-acpi.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 8f3bdd50186e..e5b27375af31 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -371,6 +371,7 @@ static const struct acpi_device_id i2c_acpi_force_100khz_device_ids[] = {
* the device works without issues on Windows at what is expected to be
* a 400KHz frequency. The root cause of the issue is not known.
*/
+ { "ASUE140D", 0 },
{ "DLL0945", 0 },
{ "ELAN0678", 0 },
{ "ELAN06FA", 0 },
---
base-commit: 6addb4f385570ebc11c4eb499a4f1c149f313e84
change-id: 20261004-i2c-acpi-asue140d-100khz-44764ecff725
Best regards,
--
Harinn <prinn.dev@pm.me>
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] i2c: acpi: Force ASUE140D touchpads to 100 kHz
2026-10-04 10:59 [PATCH] i2c: acpi: Force ASUE140D touchpads to 100 kHz Harinn via B4 Relay
@ 2026-10-04 12:04 ` Mika Westerberg
0 siblings, 0 replies; 2+ messages in thread
From: Mika Westerberg @ 2026-10-04 12:04 UTC (permalink / raw)
To: prinn.dev
Cc: Andi Shyti, Mika Westerberg, linux-i2c, linux-acpi, linux-kernel
On Sun, Oct 04, 2026 at 05:59:53PM +0700, Harinn via B4 Relay wrote:
> From: Harinn <prinn.dev@pm.me>
>
> The ASUE140D touchpad on the ASUS Zenbook UX3404VC (BIOS UX3404VC.303)
> starts lagging shortly after boot when the bus runs at the 400 kHz the
> DSDT asks for, and only recovers after rebinding i2c-hid. Forcing
> 100 kHz fixes it.
>
> Signed-off-by: Harinn <prinn.dev@pm.me>
Acked-by: Mika Westerberg <westeri@kernel.org>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-10-04 10:59 [PATCH] i2c: acpi: Force ASUE140D touchpads to 100 kHz Harinn via B4 Relay
2026-10-04 12:04 ` Mika Westerberg
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