[Wayland-bugs] [Bug 96587] Touchpad feels too sensitive, which makes cursor randomly jump when moving a finger

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96587

            Bug ID: 96587
           Summary: Touchpad feels too sensitive, which makes cursor
                    randomly jump when moving a finger
           Product: Wayland
           Version: 1.3.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: gim at fastmail.fm

Created attachment 124601
  --> https://bugs.freedesktop.org/attachment.cgi?id=124601&action=edit
evemu-record output

My touchpad, with libinput enabled, feels too sensitive in a way that even a
slight movement of my finger affects cursor position. That makes touchpad
extremely uncomfortable to use because when I move my finger a cursor makes
annoying jumpy movements in the process which makes precise cursor movements
almost unachievable.

* Down below you can see one part of `libinput-debug-events` output. I was
moving my finger diagonally up and right, but you can see that libinput detects
negative x acceleration. I believe in this moment there is a significant cursor
jump.

event16 POINTER_MOTION   +23.98s          3.44/ -1.91
event16 POINTER_MOTION   +24.01s          3.20/ -2.03
event16 POINTER_MOTION   +24.02s          0.98/ -1.52
event16 POINTER_MOTION   +24.03s         -2.83/ -0.76
event16 POINTER_MOTION   +24.06s         -3.94/ -0.51
event16 POINTER_MOTION   +24.07s         -1.48/ -0.51
event16 POINTER_MOTION   +24.08s          2.34/ -0.51
event16 POINTER_MOTION   +24.10s          3.81/ -0.51

I've also added evemu-record output as attachment in case that helps at all.

* OS: Arch Linux
* libinput: 1.3.2
* `touchpad-edge-detector` results:
Touchpad ETPS/2 Elantech Touchpad on /dev/input/event16
Move one finger around the touchpad to detect the actual edges
Kernel says:    x [0..3260], y [0..2282]
Touchpad sends: x [0..3260], y [0..2282]

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