sanju@sanju-Inspiron-N5110:~$ xinput --list
? Virtual core pointer                      id=2    [master pointer  (3)]
?   ? Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
?   ? PS/2 Generic Mouse                        id=12   [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)]
    ? Power Button                              id=8    [slave  keyboard (3)]
    ? Sleep Button                              id=9    [slave  keyboard (3)]
    ? Laptop_Integrated_Webcam_HD               id=10   [slave  keyboard (3)]
    ? AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]
    ? Dell WMI hotkeys                          id=13   [slave  keyboard (3)]

As above my touchpad is not detected by the system. version is Ubuntu 12.04

Can anyone help me?