Low touchpad accuracy on Lenovo T490
The touchpad feels off in general. Once trying to figure out why it feels strange it's noticable, that circular touchpad motion results in rectangular pointer movement.
See the attached recording. As you can see, the values are extremely aligned vertically and horizontally.
I remember my old Lenovo Yoga 460 behaving similar in the beginning, but it has been fixed for this model nowadays.
Steps to reproduce
While having the tip of the finger on the touchpad, move/wiggle the tip in a circular motion, while keeping the finger at the same location on the touchpad.
libinput version you encountered the bug on
Lenovo T490 ThinkPad SynPS/2 Synaptics TouchPad