HP EliteBook 1040 G2 / 820 G3 + Debian 9.9 MATE - No touchpad settings

G2: Tap click not working / G3: No touchpad settings

By default Debian selects the libinput driver for the touchpad. This does not work well with the touchpad on G2 and there is no support for touchpad settings for this driver. So the evdev driver can be used instead, then touchpad settings get available.

sudo bash
apt install xserver-xorg-input-evdev xserver-xorg-input-synaptics

mkdir -p /etc/X11/xorg.conf.d

Create /etc/X11/xorg.conf.d/10-synaptics.conf, fill it with:

Section "InputClass"
        Identifier "SynPS2SynapticsTouchad"
        MatchProduct "SynPS/2 Synaptics Touchad"
        driver "evdev"
        Option "TypeName" "TOUCHPAD"
EndSection

Note that MatchProduct comes from the xinput command, this may be used to find the product name.

Restart lightdm:
systemctl restart lightdm

Source: https://forums.linuxmint.com/viewtopic.php?p=1582699&sid=54d016d9fb179e9f87995696c6654249#p1582699