Fixes Lenovo Thinkpad Yoga S1 weird touchpad issues.

lenovo.conf

# The default mouse/touchpad configuration for some thinkpads and ideapads is very buggy.
# 
# The pointer jump's when clicking
# Pointer movement is very jerky
# The touchpad is very sensitve

# This configuration file attemps to fix it.

# My laptop is: Lenovo Thinkpad Yoga 
# My OS: Ubuntu 12.04 precise

# Save this under: /usr/share/X11/xorg.conf.d/lenovo.conf

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

    #Map N-fingers touch gesture to specific mouse button
    # 1 touch  = Left Click
    # 2 touchs = Right Click
    # 3 touchs = Middle button
    Option "TapButton1" "1"
    Option "TapButton2" "3"
    Option "TapButton3" "2"

    # Set to 0 means it will stop dragging when you release the finger from the touchpad
    # Set to 1 menas it will not stop dragging until you tap the touchpad.
    Option "LockedDrags" "0"
    
    # Accurate Tap-To-Click
    Option "FingerLow" "35"
    Option "FingerHigh" "45"

    # prevents too many intentional clicks
    Option "PalmDetect" "0"

    #Scrolling configuration
    Option "VertEdgeScroll" "off"
    Option "VertTwoFingerScroll" "on"
    Option "HorizEdgeScroll" "off"
    Option "HorizTwoFingerScroll" "on"
    
    #By setting minspeed and maxspeed to the same value it disables acceleartion
    Option "MinSpeed" "1"
    Option "MaxSpeed" "1"

    #Touchpad Areas
    Option "LeftEdge" "1768"
    Option "RightEdge" "5406"
    Option "TopEdge" "1640"
    Option "BottomEdge" "4498"

    #Problem: The mouse pointer jumps when clicking
    #Solution: Disables movement for the bottom part of the touchpad (the clicking area)
    Option "AreaLeftEdge" "0"
    Option "AreaRightEdge" "0"
    Option "AreaTopEdge" "0"
    Option "AreaBottomEdge" "4100"

    # This fixes jerky/jumpy mouse movement
    # Bug reference: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1042069
    Option "VertResolution" "100"
    Option "HorizResolution" "65"
    Option "AccelerationProfile" "2"
    Option "ConstantDeceleration" "16"
    Option "AdaptiveDeceleration" "16"
    Option "VelocityScale" "256"

    #some of the comments said this helps. Although it didn't help in my case.
    #noise cancellation
    #Option "HorizHysteresis" "50"
    #Option "VertHysteresis" "50"
EndSection