Re: [PATCH] i2c: acpi: Force ELAN1300 touchpads to 100 kHz

[Mika Westerberg]

On Thu, Jun 18, 2026 at 12:56:11AM +0530, Abhijeeth Babu wrote:
> The ELAN1300 touchpad with HID ID 04F3:3104 on the ASUS VivoBook
> X513UA_KM513UA exhibits severe pointer jumps and erratic movement when
> the I2C bus operates at 400 kHz.
> 
> The system DSDT describes the touchpad using an I2cSerialBusV2 resource
> with a speed of 0x00061A80, corresponding to 400 kHz, on the
> AMDI0010:03 controller.
> 
> At this speed, libinput repeatedly reports:
> 
> kernel bug: Touch jump detected and discarded
> 
> Add ELAN1300 to i2c_acpi_force_100khz_device_ids so that it operates at
> 100 kHz.
> 
> Before the change, nine touch-jump events were recorded, with additional
> messages suppressed by libinput's rate limiter. With the bus forced to
> 100 kHz, no touch-jump events have been observed and the touchpad operates
> normally.
> 
> The affected system uses BIOS X513UA.319 dated 2023-05-09.
> 
> Signed-off-by: Abhijeeth Babu <babu.jeeth@xxxxxxxxx>

Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>