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My touchpad clicking feature stopped working in Ubuntu 16.04 LTS after i upgraded kernel from version 4.4.0-64 generic to 4.8.0-39 generic.Clicking is working fine with touchpad buttons but not with the main touchpad. I have to boot with the old kernel version through the grub menu while booting.

The output of the command xinput gives the output:

⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ FTE1001:00 0B05:0101                      id=11   [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)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ USB2.0 VGA UVC WebCam                     id=10   [slave  keyboard (3)]
    ↳ Asus WMI hotkeys                          id=12   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]  

The output of the command $xinput list-props 11 gives the following output:

Device 'USB2.0 VGA UVC WebCam':
    Device Enabled (139):   1
    Coordinate Transformation Matrix (141): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    libinput Send Events Modes Available (257): 1, 0
    libinput Send Events Mode Enabled (258):    0, 0
    libinput Send Events Mode Enabled Default (259):    0, 0
    Device Node (260):  "/dev/input/event8"
    Device Product ID (261):    3034, 22494
    libinput Horizonal Scroll Enabled (262):    0
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1 Answers1

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It is not related to the kernel upgrade. You installed libinput. Tapping is disabled there by default. It can be fixed this way. Run

sudo -H gedit /usr/share/X11/xorg.conf.d/90-libinput.conf

An editor window will open. Find the touchpad section in this file and add there a line

Option "Tapping" "true"

before EndSection.

Save the file and reboot. Tapping will be enabled.

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