How early in the start process do you need that ?
if its after login you can use you DE function to start something just after its started, create a bash file and say to you DE to lunch it. KDE had an option to start some script at the sytem strat up but I don’t know if its still there or if other DE do this.
Well, the earlier the better since touchscreen in my lenovo 14" yoga causes the cursor jumping and clicking in things it shouldn’t (it happens on every linux distro).
But anyway, i don’t mind the touchscreen that much…
The thing is that i don’t know where is the Desktop enviroment function that tells that my bash file should be run on startup.
I’m using GNOME by default and i intend to keep using it.