#StackBounty: Synaptics ClickPad jumping on selection

Bounty: 50

I just got Ubuntu 16.04 LTS on my new ThinkPad E460 and it happens to have one of those “clickpads” where the buttons are hidden under the touchpad (like apple computers).

The problem is when I drag and drop, I click and hold the left button (underneath the touchpad) and move another finger on the pad. But ubuntu seems to be confused and can’t figure out which of the two fingers is supposed to “drag” and so the mouse jumps around.

The issue was reported 2 years ago in this post: Lenovo synaptics clickpad dead zones (click and drag issues)
But none of the solutions proposed satisfy me: changing AreaBottomEdge does not fix the issue, and the Soft Button Area is already defined, as my touchpad was correctly recognised as a clickpad by Ubuntu,

Here are the options I have on xinput:

Device 'AlpsPS/2 ALPS DualPoint TouchPad':
Device Enabled (138):   1
Coordinate Transformation Matrix (140): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (261): 1
Device Accel Constant Deceleration (262):   2.500000
Device Accel Adaptive Deceleration (263):   1.000000
Device Accel Velocity Scaling (264):    12.500000
Synaptics Edges (265):  614, 3481, 307, 1740
Synaptics Finger (266): 25, 30, 0
Synaptics Tap Time (267):   180
Synaptics Tap Move (268):   201
Synaptics Tap Durations (269):  180, 100, 100
Synaptics ClickPad (270):   1
Synaptics Middle Button Timeout (271):  0
Synaptics Two-Finger Pressure (272):    282
Synaptics Two-Finger Width (273):   7
Synaptics Scrolling Distance (274): -91, -91
Synaptics Edge Scrolling (275): 1, 0, 0
Synaptics Two-Finger Scrolling (276):   1, 0
Synaptics Move Speed (277): 1.000000, 1.750000, 0.043687, 0.000000
Synaptics Off (278):    2
Synaptics Locked Drags (279):   0
Synaptics Locked Drags Timeout (280):   5000
Synaptics Tap Action (281): 2, 3, 0, 0, 1, 3, 2
Synaptics Click Action (282):   1, 3, 2
Synaptics Circular Scrolling (283): 0
Synaptics Circular Scrolling Distance (284):    0.100000
Synaptics Circular Scrolling Trigger (285): 0
Synaptics Circular Pad (286):   0
Synaptics Palm Detection (287): 0
Synaptics Palm Dimensions (288):    10, 200
Synaptics Coasting Speed (289): 20.000000, 50.000000
Synaptics Pressure Motion (290):    30, 160
Synaptics Pressure Motion Factor (291): 1.000000, 1.000000
Synaptics Resolution Detect (292):  1
Synaptics Grab Event Device (293):  0
Synaptics Gestures (294):   1
Synaptics Capabilities (295):   1, 0, 0, 1, 1, 0, 0
Synaptics Pad Resolution (296): 38, 42
Synaptics Area (297):   0, 0, 0, 0
Synaptics Soft Button Areas (298):  2047, 0, 1678, 0, 0, 0, 0, 0
Synaptics Noise Cancellation (299): 22, 22
Device Product ID (256):    2, 8
Device Node (257):  "/dev/input/event6"

Any ideas?

Thanks.

EDIT: I tried Ubuntu 16.10, with the same result: it still jumps around when drag and dropping.

EDIT2: I have also tried Fedora. In Fedora it works properly! But… I really like Ubuntu much better (I’m used to apt-get etc…) So I would rather use Ubuntu. Nonetheless, what configuration files/package version should I look inside Fedora to figure which might be causing the problem in Ubuntu?

EDIT3: I checked, and Fedora seems to have xserver-xorg-synaptics version 1.9.0 instead of 1.8. Could this be the difference. I don’t seem to able to find a way to install version 1.9.0 of this package in Ubuntu.


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