[Wayland-bugs] [Bug 97819] Cursor moves when I remove my finger from touchpad

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97819

            Bug ID: 97819
           Summary: Cursor moves when I remove my finger from touchpad
           Product: Wayland
           Version: 1.5.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: sebouh00 at gmail.com

Created attachment 126540
  --> https://bugs.freedesktop.org/attachment.cgi?id=126540&action=edit
evemu recording

My touchpad is very sensitive to short movements. When I press and release my
finger, the cursor moves. In the attached evemu recording, I press my finger
then release it. The cursor moves down as my finger lifts up. A similar
behavior can be produced by touching the touchpad then rolling the finger tip
side to side. The cursor moves as it should, but by too much. With evdev, this
barely registers a cursor movement.

As a result, I have difficulty stopping on a button and tapping to click it. I
usually end up off target. Is there a way to limit cursor movement for very
short distances?


config
------
Device 'AlpsPS/2 ALPS DualPoint TouchPad':
        Device Enabled (139):   1
        Coordinate Transformation Matrix (141): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Tapping Enabled (290): 1
        libinput Tapping Enabled Default (291): 0
        libinput Tapping Drag Enabled (292):    1
        libinput Tapping Drag Enabled Default (293):    1
        libinput Tapping Drag Lock Enabled (294):       0
        libinput Tapping Drag Lock Enabled Default (295):       0
        libinput Accel Speed (273):     0.000000
        libinput Accel Speed Default (274):     0.000000
        libinput Natural Scrolling Enabled (278):       1
        libinput Natural Scrolling Enabled Default (279):       0
        libinput Send Events Modes Available (257):     1, 1
        libinput Send Events Mode Enabled (258):        0, 0
        libinput Send Events Mode Enabled Default (259):        0, 0
        libinput Left Handed Enabled (280):     0
        libinput Left Handed Enabled Default (281):     0
        libinput Scroll Methods Available (282):        1, 1, 0
        libinput Scroll Method Enabled (283):   1, 0, 0
        libinput Scroll Method Enabled Default (284):   1, 0, 0
        libinput Click Methods Available (296): 1, 1
        libinput Click Method Enabled (297):    1, 0
        libinput Click Method Enabled Default (298):    1, 0
        libinput Disable While Typing Enabled (299):    1
        libinput Disable While Typing Enabled Default (300):    1
        Device Node (260):      "/dev/input/event7"
        Device Product ID (261):        2, 8
        libinput Drag Lock Buttons (289):       <no items>
        libinput Horizonal Scroll Enabled (262):        1


laptop
------
dmi:bvnLENOVO:bvrGJET84WW(2.34):bd06/22/2015:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:

Touchpad size
-------------
97.50x53.87mm

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