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shellfan

Member

Registered: 2014-11-10

Posts: 6

synaptics mouse cursor "jumps" on slow movement

Hello,

when moving my synaptics mouse cursor very slowly, the cursor movement is not smooth and makes precise movement difficult. It does very small "jumps" in the given direction. This only occurs with my synaptics touchpad (thinkpad t450s) on linux. The trackpoint or typical usb mouses are working fine.

I've already adjusted various synaptics options like *Hysteresis, *Speed or AccelFactor values. Nothing changed.

# SynPS/2 Synaptics TouchPad

$ synclient -l

Parameter settings:
    LeftEdge                = 1574
    RightEdge               = 5368
    TopEdge                 = 1352
    BottomEdge              = 4502
    FingerLow               = 25
    FingerHigh              = 30
    MaxTapTime              = 180
    MaxTapMove              = 252
    MaxDoubleTapTime        = 100
    SingleTapTimeout        = 180
    ClickTime               = 100
    EmulateMidButtonTime    = 0
    EmulateTwoFingerMinZ    = 282
    EmulateTwoFingerMinW    = 7
    VertScrollDelta         = 114
    HorizScrollDelta        = 114
    VertEdgeScroll          = 1
    HorizEdgeScroll         = 0
    CornerCoasting          = 0
    VertTwoFingerScroll     = 1
    HorizTwoFingerScroll    = 1
    MinSpeed                = 1
    MaxSpeed                = 1.75
    AccelFactor             = 0.0348918
    TouchpadOff             = 0
    LockedDrags             = 0
    LockedDragTimeout       = 5000
    RTCornerButton          = 0
    RBCornerButton          = 0
    LTCornerButton          = 0
    LBCornerButton          = 0
    TapButton1              = 1
    TapButton2              = 2
    TapButton3              = 3
    ClickFinger1            = 1
    ClickFinger2            = 3
    ClickFinger3            = 2
    CircularScrolling       = 1
    CircScrollDelta         = 0.1
    CircScrollTrigger       = 0
    CircularPad             = 0
    PalmDetect              = 0
    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         = 28
    VertHysteresis          = 28
    ClickPad                = 1
    RightButtonAreaLeft     = 3471
    RightButtonAreaRight    = 0
    RightButtonAreaTop      = 4098
    RightButtonAreaBottom   = 0
    MiddleButtonAreaLeft    = 0
    MiddleButtonAreaRight   = 0
    MiddleButtonAreaTop     = 0
    MiddleButtonAreaBottom  = 0

$ cat /etc/X11/xorg.conf.d/50-synaptics.conf

Section "InputClass"
        Identifier "touchpad catchall"
        Driver "synaptics"
        MatchIsTouchpad "on"
        Option "TapButton1" "1"
        Option "TapButton2" "2"
        Option "TapButton3" "3"

	Option "VertEdgeScroll" "on"
	Option "VertTwoFingerScroll" "on"
	Option "HorizTwoFingerScroll" "on"
	Option "CircularScrolling" "on"
        MatchDevicePath "/dev/input/event*"
EndSection

Section "InputClass"
        Identifier "touchpad ignore duplicates"
        MatchIsTouchpad "on"
        MatchOS "Linux"
        MatchDevicePath "/dev/input/mouse*"
        Option "Ignore" "on"
EndSection

Anyone has a idea what the reason could be?

edit: i've created a little gif animation showing the issue: http://imgur.com/uBH1y7V

Last edited by shellfan (2015-08-16 17:22:37)

gnufied

Member

Registered: 2015-04-15

Posts: 13

Re: synaptics mouse cursor "jumps" on slow movement

+1 I am seeing this problem as well on T450s. This makes clicking small targets kinda hard. I have exclusively taken to using Trackpoint because of this.

mephisto

Member

Registered: 2012-11-09

Posts: 8

Re: synaptics mouse cursor "jumps" on slow movement

Same here on T450s. Would be great to have a solution for that!