I'm not a fan ouf touchscreen on my laptop, so I was looking for a way to disable it. Now you can disabled it too.

First we need to identify the VID (Vendor ID) and PID (Product ID), this can be done with lsusb.

lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 04f3:2b7c Elan Microelectronics Corp. Touchscreen
Bus 001 Device 003: ID 04f2:b6cb Chicony Electronics Co., Ltd Integrated Camera
Bus 001 Device 004: ID 8087:0026 Intel Corp. AX201 Bluetooth
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

This is the device we are looking for Bus 001 Device 002: ID 04f3:2b7c Elan Microelectronics Corp. Touchscreen. Next we have to create a new udev rule, these are located in /etc/udev/rules.d/, the filename is not important, I choose 99-disable-touchscreen.rules to have it loaded as late a possible and to have it saying what's happening.

Edit the file with your favorite editor.

sudo vim /etc/udev/rules.d/99-disable-touchscreen.rules

SUBSYSTEM=="usb", ATTRS{idVendor}=="VID", ATTRS{idProduct}=="PID", ATTR{authorized}="0"

The PID and VID needs to be replaced, after replacing it, mine looks like this

SUBSYSTEM=="usb", ATTRS{idVendor}=="04f3", ATTRS{idProduct}=="2b7c", ATTR{authorized}="0"

Now save the file and exit.

You can now exit reboot your system, or reload the udev rules by running

sudo udevadm trigger

Now your touchscreen should be disabled, enjoy.