The primary special function keys will already work, but if you're interested in mapping the touchpad special function key to toggle the touchpad on and
off here is how you do it. If you have any questions about this documentation or need further assitance contact support.
1. Open a terminal and run:
sudo nano /etc/udev/hwdb.d/61-keyboard-local.hwdb
2. Copy and paste the below lines, then hold down the ctrl key and while doing so tap the x key. You will be prompted to save the file. Hit the y key to save it:
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnNotebook*:pn*
KEYBOARD_KEY_f7=f21
KEYBOARD_KEY_f8=f21
3. Now run the following three commands to apply these changes:
sudo udevadm hwdb --update
sudo udevadm trigger
sudo reboot
When the system reboots you'll have a functioning special function key to toggle the touchpad on and off.
If you want to learn how to map special functions keys here is our guide
The technical details of mapping special function keys