Jetson TK1 - Prevent XServer

I just started playing around with my Jetson TK1 and got the drivers and CUDA toolkit installed. I noticed that it now boots with an X Server and LightDM. I’d like to prevent this since I’ll mainly be using the TK1 for computation.

I’ve done before using the boot argument “console” in grub… but we use uBoot for the TK1. I’m new to the linux embedded device setup, so I’m having trouble knowing what to be looking for. Is this done through init.d (they’re called levels I think?) or is it also a boot command.