Touchpad configuration for Samsung NP900x-400c. It should be placed in /usr/share/X11/xorg.conf.d

52-np900x4c-clickpad.conf

Section "InputClass"
  Identifier      "np900x4c clickpad"
  MatchIsTouchpad "on"
  Driver          "synaptics"

  # Enable the clickpad and set click actions
  Option "ClickPad"      "1"
  Option "ClickFinger1"  "1"
  Option "ClickFinger2"  "3"
  Option "ClickFinger3"  "2"
  Option "SoftButtonAreas" "1950 0 1900 0 0 0 0 0"
  Option "TapAndDragGesture" "0"

  # Pressure required to move the cursor
  Option "FingerHigh" "18"
  Option "FingerLow"  "18"

  # Allow a bit of error before the cursor moves.
  Option "HorizHysteresis" "17"
  Option "VertHysteresis" "17"

  # Mouse speed
  Option "MinSpeed" "1"
  Option "MaxSpeed" "5"
  Option "AccelFactor" "0.01"

  # Two Finger scroll speed
  Option "VertScrollDelta" "15"
  Option "HorizScrollDelta" "15"

  # Enable palm detection and set palm senstitivity
  Option "PalmDetect"    "1"
  Option "PalmMinWidth"  "4"
  Option "PalmMinZ"      "40"
EndSection
`