The fix I found works by editing /etc/X11/xorg.conf. For peace of mind (even though its only editing mouse speed) you may want to backup your xorg.conf! Copy it with root powers
cp /etc/X11/xorg.conf /etc/X11/xorg.conf-backup
.Open xorg.conf. Find the mouse and touchpad settings like below.
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
EndSection
Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "HorizEdgeScroll" "0"
EndSection
Under the Identifier Synaptics Touchpad (your touchpad device name maybe slightly different) and before EndSection add these three lines:
Option "MinSpeed" "0.45"
Option "MaxSpeed" "0.75"
Option "AccelFactor" "0.020"
Restart x. Log back in and try it out. You may want to try out different configurations to your liking. Note: these settings will effect your desktop environment (xfce, gnome and kde ect).
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