[Bug 2142384] [NEW] ELAN2514:00 (04F3:4428) stylus report rate extremely low (~10–25 Hz) on Ubuntu 24.04 kernel 6.17

Public bug reported:

The active stylus on my HP OmniBook x Flip Ultra 14 reports at extremely
low frequency (~10–25 Hz) under Ubuntu 24.04.4 LTS with kernel
6.17.0-14-generic. The pen input is choppy and unusable, while touch
input works normally.

The pen is a HP MPP tilt pen 2.0

Steps to Reproduce:

Boot Ubuntu 24.04.4 LTS on HP OmniBook x Flip Ultra 14.

Ensure kernel 6.17.0-14-generic is in use.

Run:
sudo libinput debug-events

And then i move the pen and compare the input events with touch on my
screen. The timestamps of the pen are 40-100 ms apart, which makes it
unusable.

I think this is the stylus in libinput:
Device: ELAN2514:00 04F3:4428 Stylus
Kernel: /dev/input/event7
Group: 5
Seat: seat0, default
Size: 300x188mm
Capabilities: tablet
Accel profiles: none

Other relevant info:

lsmod | grep hid
hid_sensor_prox 20480 0
hid_sensor_trigger 20480 3 hid_sensor_prox
hid_sensor_iio_common 24576 2 hid_sensor_trigger,hid_sensor_prox
industrialio 139264 4 industrialio_triggered_buffer,hid_sensor_trigger,hid_sensor_prox,kfifo_buf
intel_hid 32768 0
sparse_keymap 12288 2 hp_wmi,intel_hid
mac_hid 12288 0
hid_sensor_hub 28672 3 hid_sensor_trigger,hid_sensor_iio_common,hid_sensor_prox
usbhid 77824 0
hid_multitouch 36864 0
hid_generic 12288 0
i2c_hid_acpi 12288 0
i2c_hid 40960 1 i2c_hid_acpi
hid 262144 6 i2c_hid,usbhid,hid_multitouch,hid_sensor_hub,snd_soc_sdca,hid_generic


cat /sys/bus/i2c/devices/i2c-ELAN2514:00/power/control
on

Ubuntu 24.04.4 LTS
Kernel: 6.17.0-14-generic

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New

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https://bugs.launchpad.net/bugs/2142384

Title:
ELAN2514:00 (04F3:4428) stylus report rate extremely low (~10–25 Hz)
on Ubuntu 24.04 kernel 6.17

Status in linux package in Ubuntu:
New

Bug description:
The active stylus on my HP OmniBook x Flip Ultra 14 reports at
extremely low frequency (~10–25 Hz) under Ubuntu 24.04.4 LTS with
kernel 6.17.0-14-generic. The pen input is choppy and unusable, while
touch input works normally.

The pen is a HP MPP tilt pen 2.0

Steps to Reproduce:

Boot Ubuntu 24.04.4 LTS on HP OmniBook x Flip Ultra 14.

Ensure kernel 6.17.0-14-generic is in use.

Run:
sudo libinput debug-events

And then i move the pen and compare the input events with touch on my
screen. The timestamps of the pen are 40-100 ms apart, which makes it
unusable.

I think this is the stylus in libinput:
Device: ELAN2514:00 04F3:4428 Stylus
Kernel: /dev/input/event7
Group: 5
Seat: seat0, default
Size: 300x188mm
Capabilities: tablet
Accel profiles: none

Other relevant info:

lsmod | grep hid
hid_sensor_prox 20480 0
hid_sensor_trigger 20480 3 hid_sensor_prox
hid_sensor_iio_common 24576 2 hid_sensor_trigger,hid_sensor_prox
industrialio 139264 4 industrialio_triggered_buffer,hid_sensor_trigger,hid_sensor_prox,kfifo_buf
intel_hid 32768 0
sparse_keymap 12288 2 hp_wmi,intel_hid
mac_hid 12288 0
hid_sensor_hub 28672 3 hid_sensor_trigger,hid_sensor_iio_common,hid_sensor_prox
usbhid 77824 0
hid_multitouch 36864 0
hid_generic 12288 0
i2c_hid_acpi 12288 0
i2c_hid 40960 1 i2c_hid_acpi
hid 262144 6 i2c_hid,usbhid,hid_multitouch,hid_sensor_hub,snd_soc_sdca,hid_generic


cat /sys/bus/i2c/devices/i2c-ELAN2514:00/power/control
on

Ubuntu 24.04.4 LTS
Kernel: 6.17.0-14-generic

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