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Went through the past archives extensively to find a solution to this, none of them worked. OS, Ubuntu 16.04.3 TLS, H/W ACER Aspire LT Model V3-471G, BIOS Version 1.18, processor i5-3210m, 2.5 GHz. I'm not using an external mouse but want to use only the touchpad. The installation went without a hitch, this is a brand new install, not an upgrade. Everything is working, except the touchpad.

Tried various options provided in the past, such as installing synaptics, modifying the 90-synaptics.conf etc. Nothing worked. Installing synaptics makes it worse, the keyboard input stops working. BIOS doesn't have any option to switch from advanced to basic touchpad either.

$ xinput

⎡ Virtual core pointer                           id=2    [master pointer  (3)]

⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]

⎜   ↳ ETPS/2 Elantech Touchpad                  id=13   [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=12   [slave  keyboard (3)]

    ↳ Acer WMI hotkeys                          id=14   [slave  keyboard (3)]



$ uname -a

Linux roblox-Aspire-V3-471G 4.10.0-30-generic #34~16.04.1-Ubuntu SMP Wed Aug 2 02:14:26 UTC 2017 i686 i686 i686 GNU/Linux



$ xinput list-props 13

Device 'ETPS/2 Elantech Touchpad':

    Device Enabled (154):   1

    Coordinate Transformation Matrix (156): 1.000000, 0.000000, 0.000000, 0.

000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000

    Device Accel Profile (277): 1

    Device Accel Constant Deceleration (278):   2.500000

    Device Accel Adaptive Deceleration (279):   1.000000

    Device Accel Velocity Scaling (280):    12.500000

    Synaptics Edges (281):  112, 2688, 68, 1192

    Synaptics Finger (282): 1, 1, 0

    Synaptics Tap Time (283):   180

    Synaptics Tap Move (284):   135

    Synaptics Tap Durations (285):  180, 180, 100

    Synaptics ClickPad (286):   0

    Synaptics Middle Button Timeout (287):  75

    Synaptics Two-Finger Pressure (288):    282

    Synaptics Two-Finger Width (289):   7

    Synaptics Scrolling Distance (290): 61, 61

    Synaptics Edge Scrolling (291): 0, 0, 0

    Synaptics Two-Finger Scrolling (292):   1, 1

    Synaptics Move Speed (293): 1.000000, 1.750000, 0.065147, 0.000000

    Synaptics Off (294):    2

    Synaptics Locked Drags (295):   0

Synaptics Locked Drags Timeout (296):   5000

    Synaptics Tap Action (297): 2, 3, 0, 0, 1, 3, 0

    Synaptics Click Action (298):   1, 1, 0

    Synaptics Circular Scrolling (299): 0

    Synaptics Circular Scrolling Distance (300):    0.100000

    Synaptics Circular Scrolling Trigger (301): 0

    Synaptics Circular Pad (302):   0

    Synaptics Palm Detection (303): 0

    Synaptics Palm Dimensions (304):    10, 200

    Synaptics Coasting Speed (305): 20.000000, 50.000000

    Synaptics Pressure Motion (306):    30, 160

    Synaptics Pressure Motion Factor (307): 1.000000, 1.000000

    Synaptics Resolution Detect (308):  1

    Synaptics Grab Event Device (309):  0

    Synaptics Gestures (310):   1

    Synaptics Capabilities (311):   1, 0, 1, 1, 1, 1, 1

    Synaptics Pad Resolution (312): 31, 31

    Synaptics Area (313):   0, 0, 0, 0

    Synaptics Noise Cancellation (314): 15, 15

    Device Product ID (272):    2, 14

    Device Node (273):  "/dev/input/event7"

this is solved for now. After booting, I just have to issue Fn+F7 to get the touchpad to work. However, I need to do this after every reboot, the change is not persistent. Oh well, I will live have to learn to live with this. Thanks to all who offered various suggestions.

No frikin way i had the issue for a week and this just fixed it