Dell Inspiron 7347 - Inactive cursor with my touchpad on UBUNTU 14.04

Question

After installing Ubuntu 14.04, my touchpad became inactive. Everything works fine on Windows 8, but in Ubuntu it does not respond.

I have tried the following command, but the problem persists :(.

synclient touchpadOff=0

sudo apt-get update

-- (this works fine)

sudo apt-get install wget gdebi wget http://http.us.debian.org/debian/pool/main/s/synaptiks/kde-config-touchpad_0.8.1-2_all.deb  

-- ((this does not work- could not find package by regex...))

Any help is appreciated.

xinput list
    ⎡ Virtual core pointer                        id=2    [master pointer  (3)]
    ⎜   ↳ Virtual core XTEST pointer                  id=4    [slave  pointer  (2)]
    ⎜   ↳ Genius Optical Mouse                        id=10    [slave  pointer  (2)]
    ⎜   ↳ ELAN Touchscreen                            id=12    [slave  pointer  (2)]
    ⎜   ↳ ELAN Touchscreen Pen                        id=13    [slave  pointer  (2)]
    ⎜   ↳ DLL0674:00 06CB:75DB                        id=14    [slave  pointer  (2)]
    ⎜   ↳ SynPS/2 Synaptics TouchPad                  id=16    [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)]
        ↳ Integrated_Webcam_HD                        id=11    [slave  keyboard (3)]
        ↳ AT Translated Set 2 keyboard                id=15    [slave  keyboard (3)]
        ↳ Dell WMI hotkeys                            id=17    [slave  keyboard (3)]

Output from xinput list-props 16:

    Device 'SynPS/2 Synaptics TouchPad':
        Device Enabled (135):    1
        Coordinate Transformation Matrix (137):    1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        Device Accel Profile (259):    1
        Device Accel Constant Deceleration (260):    2.500000
        Device Accel Adaptive Deceleration (261):    1.000000
        Device Accel Velocity Scaling (262):    12.500000
        Synaptics Edges (293):    1765, 5371, 1638, 4474
        Synaptics Finger (294):    25, 30, 0
        Synaptics Tap Time (295):    180
        Synaptics Tap Move (296):    234
        Synaptics Tap Durations (297):    180, 180, 100
        Synaptics ClickPad (298):    1
        Synaptics Middle Button Timeout (299):    0
        Synaptics Two-Finger Pressure (300):    282
        Synaptics Two-Finger Width (301):    7
        Synaptics Scrolling Distance (302):    -106, -106
        Synaptics Edge Scrolling (303):    0, 0, 0
        Synaptics Two-Finger Scrolling (304):    1, 1
        Synaptics Move Speed (305):    1.000000, 1.750000, 0.037509, 0.000000
        Synaptics Off (306):    0
        Synaptics Locked Drags (307):    0
        Synaptics Locked Drags Timeout (308):    5000
        Synaptics Tap Action (309):    2, 3, 0, 0, 1, 3, 0
        Synaptics Click Action (310):    1, 3, 0
        Synaptics Circular Scrolling (311):    0
        Synaptics Circular Scrolling Distance (312):    0.100000
        Synaptics Circular Scrolling Trigger (313):    0
        Synaptics Circular Pad (314):    0
        Synaptics Palm Detection (315):    0
        Synaptics Palm Dimensions (316):    10, 200
        Synaptics Coasting Speed (317):    20.000000, 50.000000
        Synaptics Pressure Motion (318):    30, 160
        Synaptics Pressure Motion Factor (319):    1.000000, 1.000000
        Synaptics Resolution Detect (320):    1
        Synaptics Grab Event Device (321):    1
        Synaptics Gestures (322):    1
        Synaptics Capabilities (323):    1, 0, 0, 1, 1, 1, 1
        Synaptics Pad Resolution (324):    1, 1
        Synaptics Area (325):    0, 0, 0, 0
        Synaptics Soft Button Areas (328):    3568, 0, 4110, 0, 0, 0, 0, 0
        Synaptics Noise Cancellation (326):    26, 26
        Device Product ID (254):    2, 7
        Device Node (255):    "/dev/input/event6"

=====================================================

Thanks for the useful help. Problem solved! :)

Answer 1

You can fix it this way:

1. Run

sudo -H gedit /etc/default/grub

In the open window edit line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

it should look this way

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nopnp"

Save file and run

sudo update-grub

2. Run

   echo "blacklist i2c_hid" | sudo tee /etc/modprobe.d/i2c-hid.conf
   sudo depmod -a
   sudo update-initramfs -u
   echo "synaptics_i2c" | sudo tee -a /etc/modules
   

3. Reboot.

Please be careful, do not retype these commands, but copy them and paste into the terminal, or you can break the whole system, if mistype.

This solution disables Plug & Play for i8042 devices, then disables i2c-hid module and enables synaptics_i2c instead or it.

Plug & Play triggers a wrong module for this device.