On 18.04 you shouldn’t have to load any drivers to use a wired xbox controller. Shows up with jstest-gtk on two other machines running 18.04 here. However on the Xavier it doesn’t show up with jstest-gtk and the lights just blink on the controller. Tried with xboxdrv and ubuntu-xboxdrv no workie with either one either. So can’t drive the rover around via teleop to make a map. I’ve used this on tx1 and tx2 without any issues just doesn’t work with Xavier.
The xpad.ko module needs to be built then it works.