How to lock touchpad while typing

I'm using Ubuntu 11.10 on Dell Inspiron N5110. As the touch pad is a bit large in this model it’s frequently getting in my way while typing. Although I try my best to not touch it, the cursor still gets moved and ruins what I am typing.

I remember an option in the "Mouse and Touchpad" utility which let us lock the touchpad while we are typing but I couldn't find that option in this utility now.

Any clue?

Use syndaemon to disable while typing. Syntax is syndaemon [-i idle-time] [-d]
So something like syndaemon -i 4 -d Or, you could disable it completely with this command synclient TouchpadOff=1
Add them to your startup applications

I could fix this using dconf-editor, under org > gnome > settings daemon > peripherals > touchpad. There's an option to disable the touchpad while typing.

I also don't have the "touchpad" tab in system settings. Let me know if works for you.

UPDATE: I've just upgraded to Ubuntu 12.04 LTS, and the "touchpad tab" issue is fixed. At least with my laptop.