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I previously used Fn+F9 to disable/enable my touchpad for when I used an external mouse (when using Ubuntu 16.04). After upgrading to 18.04 I've found that when I hit that combination I get a graphic showing the touchpad icon with an "X" but it actually doesn't do anything at all.

I have an Asus UX305C

$ lsmod | grep asus
asus_nb_wmi            28672  0
asus_wmi               28672  1 asus_nb_wmi
sparse_keymap          16384  1 asus_wmi
wmi                    24576  1 asus_wmi
video                  45056  2 asus_wmi,i915
asus_wireless          16384  0
$ dconf read /org/gnome/desktop/peripherals/touchpad/send-events
'enabled'

EDIT: I discovered that it works correctly in the login screen and also works fine when using a LiveUSB 18.04. I think the issue is some residual package or setting from a 16.04.

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  • Please add output of lsmod | grep asus to the question.
    – N0rbert
    Apr 5, 2019 at 15:14
  • @N0rbert - Thanks. I knew I needed more info, but wasn't sure what to include.
    – Tim Tisdall
    Apr 5, 2019 at 18:01
  • I'm have just booted my Ubuntu 18.04.2 LTS (using MATE and GNOME DEs, with kernel 4.15.0-47, without Xorg HWE) on my UX32A. The loaded kernel modules are the same as yours. I have no problems: <Fn>+<F9> enables and disables touchpad normally. What is your desktop environment? Please add output of dconf read /org/gnome/desktop/peripherals/touchpad/send-events (for GNOME) or dconf read /org/mate/desktop/peripherals/touchpad/touchpad-enabled (for MATE) to the question.
    – N0rbert
    Apr 5, 2019 at 18:56
  • 1
    You might look at touchpad-indicator. It does all of this auto-magically.
    – heynnema
    Apr 5, 2019 at 20:21
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    @N0rbert when advicing people to manually edit dconf setting, better advice to use gsettings, which is the cli frontend to dconf. One of the reasons is that the higher level gsettings includes consistency check for dconf. The command for gsettings would then be on 18.04: gsettings set org.gnome.desktop.peripherals.touchpad send-events 'disabled'
    – Jacob Vlijm
    Apr 5, 2019 at 20:28

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