No signal to HDMI

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi,

I just purchased a TX2 Dev Kit and plugged it in and am not getting any signal to the monitor via HDMI. LEDs are lighting up, but I don’t see anything on the screen.

How can debug this problem?

Thanks!
Shalom

2

You probably don’t have a serial console cable, but this is by far the easiest method if available since normally the issue is only video configuration and not that the system isn’t working. Here is a URL on serial console:
http://www.jetsonhacks.com/2017/03/24/serial-console-nvidia-jetson-tx2/

ssh should also work. If you look at your router logs (or host logs if using it as a router) you will find the address. User “ubuntu” has default password “ubuntu”, and user “nvidia” has default password “nvidia”. If it turns out your address of the Jetson is 192.168.1.3 for example, these would work:

ping 192.168.1.3
ssh ubuntu@192.168.1.3

If you’ve never flashed I’d highly recommend just flashing to R28.1 (either by command line or via JetPack3.1).

3

Thanks for linuxdev to provide debug method.

shalom,

Please try to get into system (if system is able to up), and upload the log by command “dmesg” and /var/log/Xorg.0.log

4

Hey Everyone,

Thanks for your suggestions!

Before I went down the path of trying to connect a separate host to the TX2 via a serial cable of the sort that was suggested above… I thought I’d try one more time to play with the HDMI cable, so I pulled it out and turned it around and plugged back into the monitor and TX2. You’ll be happy to know that I was able to see the boot up process on the screen after doing that! Such a frustrating thing when it’s a cable issue and you just assume the cables should work fine.

This is my first experience with the Jetson, so I’m sure you’ll be hearing form me again very soon! :)

Cheers,
Shalom

5

Shalom,

Please note that in rel-28.1 there was a bug that for some monitor, if you boot your jetson with HDMI cable attached, it cannot boot.

However, if you hotplug it after system is ready, it will have chance to pass successfully. The fastest way to avoid this issue is using our rel-28.2 DP.