Jetson TX1 serial console control

https://devtalk.nvidia.com/default/topic/926197/jetson-tx1/change-default-serial-console/

To get rid of the early messages get rid of the earlyprintK statement in the boot command line. Once you remove that and the debug_uartport-lsport statement you will see nothing on the screen until the desktop pops up. If you want no messages at boot also get rid of the console=ttySx statement leave in the console=ttyx as that is a virtual tty that feeds the flipscreens. Also get rid of /etc/init/ttySx.conf files. If you forget to do this instead of rebooting you can do sudo stop ttySx All the messages are in log files anyway so you aren't going to loose any useful information.

Dan