I tried to use the Jetson Headless, and tried to do the setup for accessing the Jetson using VNCViewer,
Following is what I did:
sudo nano /usr/share/glib-2.0/schemas/org.gnome.Vino.gschema.xml
Added following new key:
Enable remote access to the desktop
If true, allows remote access to the desktop via the RFB
protocol. Users on remote machines may then connect to the
desktop using a VNC viewer.
true