Same problem on Dell Inspiron 9100 touchpad. Edited xorg with the
following and works like a charm (may want to change the MinSpeed and
MaxSpeed to your liking):
Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "LeftEdge" "1700"
Option "RightEdge" "5300"
Option "TopEdge" "1700"
Option "BottomEdge" "4200"
Option "FingerLow" "25"
Option "FingerHigh" "30"
Option "MaxTapTime" "180"
Option "MaxTapMove" "220"
Option "VertScrollDelta" "100"
Option "MinSpeed" "0.75"
Option "MaxSpeed" "0.90"
Option "AccelFactor" "0.0015"
Option "SHMConfig" "on"
--
touchpad uses wrong driver
https://bugs.launchpad.net/bugs/114469
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