How do I enable multitouch support on synaptics?

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http://askubuntu.com – I'm using Vaio which uses Synaptics touch pad. Multi touch gestures worked with no trouble on my previous installed operating system, windows 7. Now it seems like I can't use multi touch gestures on Ubuntu 12.10 at all. How exactly do I install the right drivers to make multi touch possible on my laptop. Thank you in advanced. Best regards (HowTos)