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Recently I set up my new t490s with synaptics and libinput. Everything works like a charm. However, I experienced that two-finger and three-finger click only work when I have the fingers close together. When they are somewhat spread across the clickpad, multitouch clicks are not registered correctly. In fact, they are registered with "one finger less", i.e. three-finger -> as two-finger and two-finger -> normal click.

I think this might be a synaptics mishap, since scrolling AND TAPPING work just fine with the same "distance" between the fingers.

Hence my question: Is there any way how to define the maximum distance in which multitouch gestures are recognized by synaptics?

# uname -r
arch 5.2.5-arch1-1-ARCH

# synclient -V
1.9.1

# libinput --version
1.13.4

# synclient -l
Parameter settings:
    LeftEdge                = 122
    RightEdge               = 2930
    TopEdge                 = 101
    BottomEdge              = 1787
    FingerLow               = 25
    FingerHigh              = 30
    MaxTapTime              = 180
    MaxTapMove              = 158
    MaxDoubleTapTime        = 180
    SingleTapTimeout        = 180
    ClickTime               = 100
    EmulateMidButtonTime    = 0
    EmulateTwoFingerMinZ    = 282
    EmulateTwoFingerMinW    = 7
    VertScrollDelta         = -77
    HorizScrollDelta        = -121
    VertEdgeScroll          = 0
    HorizEdgeScroll         = 0
    CornerCoasting          = 0
    VertTwoFingerScroll     = 1
    HorizTwoFingerScroll    = 1
    MinSpeed                = 1
    MaxSpeed                = 1.75
    AccelFactor             = 0.0557414
    TouchpadOff             = 2
    LockedDrags             = 0
    LockedDragTimeout       = 5000
    RTCornerButton          = 0
    RBCornerButton          = 0
    LTCornerButton          = 0
    LBCornerButton          = 0
    TapButton1              = 1
    TapButton2              = 3
    TapButton3              = 2
    ClickFinger1            = 1
    ClickFinger2            = 3
    ClickFinger3            = 2
    CircularScrolling       = 0
    CircScrollDelta         = 0.100007
    CircScrollTrigger       = 0
    CircularPad             = 0
    PalmDetect              = 1
    PalmMinWidth            = 10
    PalmMinZ                = 200
    CoastingSpeed           = 20
    CoastingFriction        = 50
    PressureMotionMinZ      = 30
    PressureMotionMaxZ      = 160
    PressureMotionMinFactor = 1
    PressureMotionMaxFactor = 1
    GrabEventDevice         = 0
    TapAndDragGesture       = 1
    AreaLeftEdge            = 0
    AreaRightEdge           = 0
    AreaTopEdge             = 0
    AreaBottomEdge          = 0
    HorizHysteresis         = 17
    VertHysteresis          = 17
    ClickPad                = 1
    RightButtonAreaLeft     = 1526
    RightButtonAreaRight    = 0
    RightButtonAreaTop      = 1548
    RightButtonAreaBottom   = 0
    MiddleButtonAreaLeft    = 0
    MiddleButtonAreaRight   = 0
    MiddleButtonAreaTop     = 0
    MiddleButtonAreaBottom  = 0
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    Please, try latest released libinput (1.14.3 as of writing the words). If it doesn't help, then report a bug. – Hi-Angel Oct 28 '19 at 20:27
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    Indeed @Hi-Angel, this issue does no longer occur now. I am on 1.14.3. Thanks – loki Nov 2 '19 at 11:08
  • Amazing! You may want to write an answer about how you installed the newer libinput, and that it fixed the problem. – Hi-Angel Nov 2 '19 at 12:42
  • As I am running Arch, this problem was solved by updating my system. – loki Nov 7 '19 at 9:42