TX2+auvidea j120 rev8 console output error

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

when i start the device,the console output is ‘>’ the cmd does not run

Ubuntu 16.04 LTS tegra-ubuntu ttyS0

tegra-ubuntu login: nvidia (automatic login)

Last login: Fri May  6 05:40:19 UTC 2016 on ttyS0
[   13.719777] IPVS: Creating netns size=1424 id=2
Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.3s.

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

nvidia@tegra-ubuntu:~$ [   14.725252] IPVS: Creating netns size=1424 id=3

>
>
>ls
>lsls
>ls
>
>
>ls
>ls
>[  315.301330] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
2

Obviously it shouldn’t do that, but try CTRL-c and CTRL-d to get out of that if possible.

3

There’s a MCU on J120 that hijacks this serial port and sniffs on traffic for MCU-specific commands. There’s a way to bypass it which is documented in the J120 manual, but it requires decent soldering skills and flashing a different MCU firmware. I haven’t done it myself, since I don’t use the serial console very often, but if it bothers you, check out the manual.

-albertr