Touchpad not working on Acer laptop

I installed Ubuntu 13.04 x64-amd on my Acer Aspire v3-471G laptop. The touchpad wasn`t working since I started the installation process from a USB flash device using Pen Drive and continue to be not functional after successful installation. I updated the system but nothing got it worked.

Using command xinput list to list the available connected device, it shows the following

Virtual core pointer                        id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Genius 2.4G Wireless Mouse                id=12   [slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                  id=14   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Power Button                              id=9    [slave  keyboard (3)]
    ↳ Sleep Button                              id=10   [slave  keyboard (3)]
    ↳ HD WebCam                                 id=11   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]
    ↳ Acer WMI hotkeys                          id=15   [slave  keyboard (3)]

I couldn`t find any solution online. I appreciate any help here :)

Solution 1:

Yahya's solution worked. But with one extra step. I went to BIOS, set touchpad to basic.

At first it did not work but when I activated the toucpad using FN+F7, it started to work.