I have a Sony PCG-Z1WA laptop withan ALPS touchpad. (Synaptics driver)

I could adjust the mouse speed all day in the gui config but it didn’t change.
So, here is what I did. I noticed in /etc/X11/xorg.conf was already using the Synaptics driver.
Config:

Section “InputDevice”
Identifier “Synaptics Touchpad”
Driver “synaptics”
Option “SendCoreEvents” “true”
Option “Device” “/dev/psaux”
Option “Protocol” “auto-dev”
Option “HorizScrollDelta” “0”

Added:
==================
Option “MinSpeed” “0.7”
Option “MaxSpeed” “0.95”
Option “AccelFactor” “0.055”
Option “SHMConfig” “on”
==================
EndSection

The SHMConfig is so I could download and use a GUI config for the pointer
sudo apt-get intall qsynaptics

The speed I adjusted by hand in the config seems to be fast enough for me now.