ORIGINAL HERE: https://stackoverflow.com/questions/4012352/linux-dual-mice-multiple-mice-with-multiple-mouse-pointers
I've found a way to do it, but it causes major tearing with Gnome.
- Open a terminal and type in
xinput
(all commands should be done as normal user). - Look at the id of the one of your mice or touchpad.
- Then create a new master device with this command
xinput create-master "name"
. (any name of your choice.) - Get the new master "name" numeric id.
- Now you just need to reattach one of your mice to the new master
xinput reattach "mouse id" "new master id"
.