Hi,

I am using Debian testing on a Dell E7440, which just switched libinput from 1.9.4-2 to 1.10.0-1. When I touch the touchpad, without moving the finger, the cursor vibrates. It does not depend on the pressure. Cursor does not move much, but it makes it difficult to click on precise areas.

Do not hesitate to ask if you need more information.

Best regards,
Yvan

$ xinput list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ xwayland-pointer:13                     	id=6	[slave  pointer  (2)]
⎜   ↳ xwayland-relative-pointer:13            	id=7	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ xwayland-keyboard:13                    	id=8	[slave  keyboard (3)]

$ xinput list-props 2
Device 'Virtual core pointer':
	Device Enabled (119):	1
	Coordinate Transformation Matrix (121):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
$ xinput list-props 4
Device 'Virtual core XTEST pointer':
	Device Enabled (119):	1
	Coordinate Transformation Matrix (121):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	XTEST Device (238):	1
$ xinput list-props 6
Device 'xwayland-pointer:13':
	Device Enabled (119):	1
	Coordinate Transformation Matrix (121):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	Device Accel Profile (244):	0
	Device Accel Constant Deceleration (245):	1.000000
	Device Accel Adaptive Deceleration (246):	1.000000
	Device Accel Velocity Scaling (247):	10.000000

$ udevadm info /sys/class/input/event2
P: /devices/platform/i8042/serio1/input/input2/event2
N: input/event2
S: input/by-path/platform-i8042-serio-1-event-mouse
E: DEVLINKS=/dev/input/by-path/platform-i8042-serio-1-event-mouse
E: DEVNAME=/dev/input/event2
E: DEVPATH=/devices/platform/i8042/serio1/input/input2/event2
E: ID_BUS=i8042
E: ID_INPUT=1
E: ID_INPUT_HEIGHT_MM=43
E: ID_INPUT_TOUCHPAD=1
E: ID_INPUT_TOUCHPAD_INTEGRATION=internal
E: ID_INPUT_WIDTH_MM=95
E: ID_PATH=platform-i8042-serio-1
E: ID_PATH_TAG=platform-i8042-serio-1
E: ID_SERIAL=noserial
E: LIBINPUT_DEVICE_GROUP=11/2/8:isa0060/serio1
E: LIBINPUT_MODEL_ALPS_TOUCHPAD=1
E: LIBINPUT_MODEL_FIRMWARE_VERSION=310
E: MAJOR=13
E: MINOR=66
E: SUBSYSTEM=input
E: USEC_INITIALIZED=50227224

$ cat /sys/class/dmi/id/modalias
dmi:bvnDellInc.:bvrA22:bd10/18/2017:svnDellInc.:pnLatitudeE7440:pvr00:rvnDellInc.:rn091TRH:rvrA00:cvnDellInc.:ct9:cvr: