https://bugs.freedesktop.org/show_bug.cgi?id=105022

            Bug ID: 105022
           Summary: Lenovo P50 - Slow fine touchpad movement makes it jump
           Product: Wayland
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: other
            Status: NEW
          Severity: major
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs@lists.freedesktop.org
          Reporter: krasi.r...@gmail.com

Created attachment 137243
  --> https://bugs.freedesktop.org/attachment.cgi?id=137243&action=edit
logs

Fedora 27, KDE (the same on Gnome)

When trying to to do a fine movement on the touchpad it jumps making it
impossible to do fine selection on small text and click small buttons.


libinput --version
1.9.4


Here is a short video 
https://www.youtube.com/watch?v=Yqeu5ZrC_p0

Let me know how can I obtain any further debug info you need.

How reproducible:
always



Device:           SynPS/2 Synaptics TouchPad
Kernel:           /dev/input/event6
Group:            8
Seat:             seat0, default
Size:             100x55mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    none
Disable-w-typing: enabled
Accel profiles:   none
Rotation:         n/a



Trackpoint seems to be working fine but that is impossible to use for fine
selection as well as it is not so sensitive.


when I run libinput-debug-events I see the pauses there as well, but in
evemu-record I see no pauses but the SYN_REPORT seems to show some high ...ms
numbers when it jumps


dmesg | grep synaptics
[45462.267789] psmouse serio2: Failed to disable mouse on synaptics-pt/serio0
[45463.917768] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[45463.951593] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[57186.672594] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[57186.706204] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[70344.182014] psmouse serio2: Failed to disable mouse on synaptics-pt/serio0
[70345.835838] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[70345.869367] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[71920.887255] psmouse serio2: Failed to disable mouse on synaptics-pt/serio0
[71922.547431] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[71922.581315] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[73774.120004] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[73774.150886] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[153129.909367] psmouse serio2: Failed to disable mouse on synaptics-pt/serio0
[153131.577309] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[153131.610758] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[189275.078662] psmouse serio2: Failed to disable mouse on synaptics-pt/serio0
[189276.740406] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[189276.774166] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]
[198254.977092] psmouse serio1: synaptics: queried max coordinates: x [..5676],
y [..4754]
[198255.010772] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1100..]

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