I just bought a P580 IdeaPad and it doesn't seem to understand any kind of gestures or scrolling using the Touchpad.
I looked through the manual and I couldn't find anything about it either.
When I started up the machine, the only driver it had installed by default for the mouse was a default "Microsoft PS/2 Mouse".
I tried downloading and installing the P580 touchpad driver from the Lenovo website, but that didn't make much difference either. Windows 7 picked the ELAN driver as the matching driver, and still no luck in terms of gestures or scrolling.
It's a wide screen, and it's a lot of work to move your cursor across the screen to do simple things like scrolling.
The correct touchpad drivers should be installed in order to provide the advanced functions of the touchpad. If generic mouse / touchpad drivers are installed or the incorrect touchpad driver is installed, some features may not be available, and the touchpad may function erratically.
The Touchpad driver package for the P580 actually includes driver for the 3 different manufacturers of touchpad, Cypress, Synaptics and ElanTech which could used in the P580.
Go to Lenovo's support site and download the "Touchpad" driver package for your version of Windows.