Bug 1236642

Description of problem:Detection of gesture of more than one finger has became worst with the libinput 0.18 update. Example of gesture would be two finger scrolling, before the update it detects fine but after the update it often register it as is I place the cursor using another finger when I already have one finger on the touchpad


Version-Release number of selected component (if applicable): 0.18


How reproducible:Very 


Steps to Reproduce:
1.Open anything that can be scrolled (a website)
2.Use two finger to scroll down the page like you used to before the update
3.Observe the decreased sensitivity in two finger detection/algorithm

Actual results: Wonky scrolling half of the time


Expected results: Flawless gesture detection as before the 0.18 update


Additional info: output of libinput-list-devices

Device:           Power Button
Kernel:           /dev/input/event2
Group:            1
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none

Device:           Video Bus
Kernel:           /dev/input/event4
Group:            2
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none

Device:           Sleep Button
Kernel:           /dev/input/event1
Group:            3
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none

Device:           Lenovo EasyCamera
Kernel:           /dev/input/event10
Group:            4
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none

Device:           Ideapad extra buttons
Kernel:           /dev/input/event6
Group:            5
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none

Device:           AT Translated Set 2 keyboard
Kernel:           /dev/input/event3
Group:            6
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none

Device:           SynPS/2 Synaptics TouchPad
Kernel:           /dev/input/event5
Group:            7
Seat:             seat0, default
Size:             87.45x58.16mm
Capabilities:     pointer 
Tap-to-click:     disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   *two-finger 
Click methods:    *button-areas clickfinger