Headless Mode setup failed

Autonomous Vehicles DRIVE AGX Orin DRIVE AGX Orin General
1

Please provide the following info (tick the boxes after creating this topic):
Software Version
[ ✓] DRIVE OS 6.0.6
DRIVE OS 6.0.5
DRIVE OS 6.0.4 (rev. 1)
DRIVE OS 6.0.4 SDK
other

Target Operating System
[✓] Linux
QNX
other

Hardware Platform
[✓] DRIVE AGX Orin Developer Kit (940-63710-0010-300)
DRIVE AGX Orin Developer Kit (940-63710-0010-200)
DRIVE AGX Orin Developer Kit (940-63710-0010-100)
DRIVE AGX Orin Developer Kit (940-63710-0010-D00)
DRIVE AGX Orin Developer Kit (940-63710-0010-C00)
DRIVE AGX Orin Developer Kit (not sure its number)
other

SDK Manager Version
[✓] 1.9.3.10904
other

Host Machine Version
[✓] native Ubuntu Linux 20.04 Host installed with SDK Manager
native Ubuntu Linux 20.04 Host installed with DRIVE OS Docker Containers
native Ubuntu Linux 18.04 Host installed with DRIVE OS Docker Containers
other

Good evening,

We successfully flashed DRIVE OS 6.0.6 and set up the kit. Everything seemed to work as it should, we tested both headless and non headless mode for vnc and both worked, external monitor was also live. Now, after a couple of days, without changing anything to the kit or the cables that were used to connect it to the host and the external display, we get two major issues. Firstly, the external display says “No DP signal from your device” although it worked before. Secondly, when trying to connect with headless mode to bypass the display problem, this also does not seem to work. Xrandr in headless outputs: Can’t open display instead of the appropriate output stated here: VNC (nvidia.com).
Your support on why the external monitor does not connect (although it did before) and why headless mode fails will be greatly appreciated.

Thank you!

2

Dear @ntsourveloudis,
Could you check if the below steps on your target and confirm if it works

On First ssh terminal

sudo service gdm3 stop
sudo service gdm stop
sudo -b X -ac -noreset
export DISPLAY=:0
sudo xrandr --fb 1920x1080 #may fail
sudo x11vnc -geometry 1920x1080 -display :0 &

Open VNC connection using VNC viewer. I would expect to see blank screen on VNC connection.
Now, open second ssh terminal launch any application which has GUI to see if it opens in VNC terminal.

5

Dear @SivaRamaKrishnaNV ,

Thank you for your quick reply!
The display problem was fixed by reinstalling gdm.service. The steps that you provided for the headless-mode worked.

7

Dear @ntsourveloudis,
Could you confirm if the provided steps are sufficient fix fixing the issue. Let me know if you have performed any extra steps.

9

Dear @SivaRamaKrishnaNV ,
As I stated in my previous post, I confirm that the provided steps worked.
Thank you!

10

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