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Noctivivans

Member

Registered: 2010-01-12

Posts: 14

synaptics touchpad two finger scroll "bounces" from bottom edge

I have strange problem with my touchpad while using two finger scroll - when I put fingers vertically on touchpad (in parallel to shorter edge of touchpad), start scrolling and reach bottom edge, it starts to scroll in opposite direction (amount of backward scroll depend of speed of scroll before reaching edge). When I put fingers horizontally (in parallel to longer edge of touchpad), it works as expected (no "bounce" effect).

here is my /etc/X11/xorg.conf.d/50-synaptics.conf (I also tried without any config with libinput driver instead of synaptics):

Section "InputClass"
    Identifier "touchpad"
    Driver "synaptics"
    MatchIsTouchpad "on"
        Option "TapButton1" "1"
        Option "TapButton2" "3"
        Option "TapButton3" "2"
        Option "VertEdgeScroll" "off"
        Option "VertTwoFingerScroll" "on"
        Option "HorizEdgeScroll" "off"
        Option "HorizTwoFingerScroll" "on"
        Option "CircularScrolling" "off"
    Option "CircScrollTrigger" "2"
        Option "FingerLow" "30"
        Option "FingerHigh" "40"
EndSection

xinput shows that I have "SynPS/2 Synaptics TouchPad"
I tested two finger scrolling on two laptops (Acer TravelMate 8372 and Lenovo T430) and on both touchpads behave identical.

Any ideas?