I tried a lot to make touchpad enable in Ubuntu 16.04.1. I reinstalled drivers, kernals, was using synclient(as a matter of fact it has never changed "TouchpadOff" option), dconf. The only thing that helped me is setting inside of BIOS(or in my case UEFI) touchpad option to "Basic".
But I've got dual booting Ubuntu-Win10 and using Windows with "Basic" option isn't satisfying.
So the question: how to enable touchpad without changing BIOS's options?
UPD:
Cannot set this option in synclient setting also:
 synclient | grep Touchpad
    TouchpadOff             = 2
 synclient Touchpadoff=0 
 synclient | grep Touchpad
    TouchpadOff             = 0
 synclient | grep Touchpad
    TouchpadOff             = 2
xinput:
⎡ Virtual core pointer                id=2     [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer      id=4     [slave  pointer  (2)]
⎜   ↳ A4TECH USB Device               id=12    [slave  pointer  (2)]
⎜   ↳ A4TECH USB Device               id=13    [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad         id=15    [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=14    [slave  keyboard (3)]
    ↳ Acer WMI hotkeys                id=16    [slave  keyboard (3)]
xinput list-props:
Device 'PS/2 Synaptics TouchPad':
    Device Enabled (137):   1
    Coordinate Transformation Matrix (139): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    Device Accel Profile (263): 0
    Device Accel Constant Deceleration (264):   1.000000
    Device Accel Adaptive Deceleration (265):   1.000000
    Device Accel Velocity Scaling (266):    10.000000
    Device Product ID (257):    2, 1
    Device Node (258):  "/dev/input/event9"
    Evdev Axis Inversion (267): 0, 0
    Evdev Axes Swap (269):  0
    Axis Labels (270):  "Rel X" (147), "Rel Y" (148)
    Button Labels (271):    "Button Left" (140), "Button Middle" (141), "Button Right" (142), "Button Wheel Up" (143), "Button Wheel Down" (144)
    Evdev Scrolling Distance (272): 0, 0, 0
    Evdev Middle Button Emulation (273):    0
    Evdev Middle Button Timeout (274):  50
    Evdev Third Button Emulation (275): 0
    Evdev Third Button Emulation Timeout (276): 1000
    Evdev Third Button Emulation Button (277):  3
    Evdev Third Button Emulation Threshold (278):   20
    Evdev Wheel Emulation (279):    0
    Evdev Wheel Emulation Axes (280):   0, 0, 4, 5
    Evdev Wheel Emulation Inertia (281):    10
    Evdev Wheel Emulation Timeout (282):    200
    Evdev Wheel Emulation Button (283): 4
    Evdev Drag Lock Buttons (284):  0
 
     
    