Sensitive touchpad

Vaio laptops usually have ALPS touchpads which we can configure using gsynaptics.

First install it with
sudo apt-get install gsynaptics

then open /etc/X11/xorg.conf for editing
sudo nano /etc/X11/xorg.conf

and put this line into “Synaptics Touchpad” section you found there
Option "SHMConfig" "true".

The whole section should look like this:

Section "InputDevice"
Identifier      "Synaptics Touchpad"
Driver          "synaptics"
Option          "SendCoreEvents"        "true"
Option          "Device"        "/dev/psaux"
Option          "Protocol"      "auto-dev"
Option          "HorizEdgeScroll"       "0"
Option          "SHMConfig"      "true"
EndSection

If you have not this section in your xorg.conf (like on Intrepid), just add it using code above.
Then make logout and login back and run gsynaptics from menu System->Preferences->Touchpad.

P.S. Who knows how to make that double-quotes look like original in wordpress?

UPD: Sorry, we have ALPS touchpad in Vaio. But gsynaptics helps anyway. Post fixed.

UPD2: Mikko Tikkanen mentioned abouth another way how to turn it on