Hi, I am trying to setup desktop sharing mainly to run the Jetson Nano board via VNC in headless mode without a monitor. But everytime I select the Desktop Sharing icon in System Settings menu, I get error: "Sorry, Ubuntu 18.04 has experienced an internal error." Is this a known issue with this initial release? If not, can someone please let me know what the issue may be. Thanks.

Hi, I have tried the same on Jetson TX2 with JetPack 4.2 and failed. There seems to be no key named 'enabled'. You can create that key, but vino-server will still refuse to start. I gave up on that and after one day of head scratching I found an alternative solution: 1. Install TigerVNC server: [code]$ sudo apt install tigervnc-standalone-server tigervnc-xorg-extension -y[/code] 2. Set a password for the VNC server: [code]$ vncpasswd[/code] 3. Create the file "/home/nvidia/.vnc/xstartup" with the following content: [code]#!/bin/sh export XDG_RUNTIME_DIR=/run/user/1000 export XKL_XMODMAP_DISABLE=1 unset SESSION_MANAGER unset DBUS_SESSION_BUS_ADDRESS xrdb /home/nvidia/.Xresources xsetroot -solid grey gnome-session &[/code] 4. Create the empty file ".Xresources" in your user's home directory: [code]$ touch /home/nvidia/.Xresources[/code] 5. Create the file "/etc/systemd/system/vncserver@.service" with the following content: [code][Unit] Description=Start TightVNC server at startup After=syslog.target network.target [Service] Type=forking User=nvidia Group=nvidia WorkingDirectory=/home/nvidia PIDFile=/home/nvidia/.vnc/%H:%i.pid ExecStartPre=-/usr/bin/vncserver -kill :%i > /dev/null 2>&1 ExecStart=/usr/bin/vncserver -localhost no -depth 24 -geometry 1280x720 :%i ExecStop=/usr/bin/vncserver -kill :%i [Install] WantedBy=multi-user.target[/code] 6. Make sure the VNC server starts after system boot: [code]$ sudo systemctl daemon-reload $ sudo systemctl enable vncserver@1[/code] 7. Configure auto-login with GDM3. Open "/etc/gdm3/custom.conf" and uncomment or change the following lines: [code]AutomaticLoginEnable=true AutomaticLogin=nvidia[/code] 8. Reboot the system and try to reach the VNC server at port 5901. Warning: You have to open GNOME settings immediately and disable the screen saver and screen locking. If the session is locked you cannot enter your password (reasons unknown). Please report back.

$ sudo apt install tigervnc-standalone-server tigervnc-xorg-extension -y

$ vncpasswd

#!/bin/sh
export XDG_RUNTIME_DIR=/run/user/1000
export XKL_XMODMAP_DISABLE=1
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS

xrdb /home/nvidia/.Xresources
xsetroot -solid grey

gnome-session &

$ touch /home/nvidia/.Xresources

[Unit]
Description=Start TightVNC server at startup
After=syslog.target network.target

[Service]
Type=forking
User=nvidia
Group=nvidia
WorkingDirectory=/home/nvidia
PIDFile=/home/nvidia/.vnc/%H:%i.pid
ExecStartPre=-/usr/bin/vncserver -kill :%i > /dev/null 2>&1
ExecStart=/usr/bin/vncserver -localhost no -depth 24 -geometry 1280x720 :%i
ExecStop=/usr/bin/vncserver -kill :%i

[Install]
WantedBy=multi-user.target

$ sudo systemctl daemon-reload
$ sudo systemctl enable vncserver@1

AutomaticLoginEnable=true
AutomaticLogin=nvidia

@IceBlackz: Thanks for pointing this out. I tried to change the session to the 'real' GNOME 3 desktop (no Unity) and I could finally enable the vino server. It worked great until I disconnected the monitor and rebooted. After the reboot the vino server is brought up again, but after connecting to it I only saw the NVIDIA logo, but no GNOME desktop. It seems that GNOME has issues if Xorg does not provide a proper modeline (this seems to be a major difference compared to JetPack 3.3). My approach in #2 has the disadvantage of increased memory usage (actually you are running two GNOME sessions in parallel), but it is a way out of this situation. Another solution would be to install the 'xserver-xorg-video-dummy' package and run with a dummy session when there is no monitor available. Can someone from the NVIDIA staff reproduce this issue and maybe offer some xorg.conf tricks?

@animan9: Please select the "Ubuntu" session at the login screen and log in to this session one time with a monitor attached. You can then try the instructions in #2. Good luck! The difference between the two options is the "Unity" session being a home grown desktop developed by Canonical (Ubuntu sponsor) based on GNOME, while the "Ubuntu" session is the 'real' GNOME 3 shell. Starting from Ubuntu 18.04 Canonical has abandoned their Unity desktop in favor of the GNOME 3 shell. If you find the memory usage of the solution in #2 as being too high (it adds ~400 MB) you can also try these steps: 1. Attach a monitor, log into the "Ubuntu" session, go to Settings -> Sharing -> Screen Sharing -> turn on screen sharing -> set 'Access Options' to 'Require a password' and set a password Close all dialogs afterwards. 2. Install the Xorg dummy: [code]$ sudo apt install xserver-xorg-video-dummy -y[/code] 3. Modify the file "/etc/X11/xorg.conf" to look like this: [code]# Copyright (c) 2011-2013 NVIDIA CORPORATION. All Rights Reserved. # # This is the minimal configuration necessary to use the Tegra driver. # Please refer to the xorg.conf man page for more configuration # options provided by the X server, including display-related options # provided by RandR 1.2 and higher. # Disable extensions not useful on Tegra. Section "Module" Disable "dri" SubSection "extmod" Option "omit xfree86-dga" EndSubSection EndSection Section "Device" Identifier "Tegra0" Driver "nvidia" # Allow X server to be started even if no display devices are connected. Option "AllowEmptyInitialConfiguration" "true" # Suppress an error in Xorg log Option "ConnectToAcpid" "Off" EndSection # Dummy for headless mode Section "Device" Identifier "Dummy0" Driver "dummy" VideoRam 16384 EndSection Section "Monitor" Identifier "Monitor0" HorizSync 5.0-1000.0 VertRefresh 5.0-200.0 Modeline "1280x800" 24.15 1280 1312 1400 1432 800 819 822 841 EndSection Section "Screen" Identifier "Screen0" Monitor "Monitor0" Device "Dummy0" DefaultDepth 24 SubSection "Display" Depth 24 Virtual 1280 800 EndSubSection EndSection[/code] 4. Disconnect the monitor, reboot the Jetson and try to connect to port 5900 with your favorite VNC viewer. This way you can use the vino server. The downside is that you cannot attach a monitor to the Jetson after this modification. If you want to attach a monitor you have to comment out all the lines below the "# Dummy for headless mode" line. I am still looking for a solution to have the two drivers ("nvidia" and "dummy") coexist peacefully.

$ sudo apt install xserver-xorg-video-dummy -y

# Copyright (c) 2011-2013 NVIDIA CORPORATION.  All Rights Reserved.

#
# This is the minimal configuration necessary to use the Tegra driver.
# Please refer to the xorg.conf man page for more configuration
# options provided by the X server, including display-related options
# provided by RandR 1.2 and higher.

# Disable extensions not useful on Tegra.
Section "Module"
    Disable     "dri"
    SubSection  "extmod"
        Option  "omit xfree86-dga"
    EndSubSection
EndSection

Section "Device"
    Identifier  "Tegra0"
    Driver      "nvidia"
    # Allow X server to be started even if no display devices are connected.
    Option      "AllowEmptyInitialConfiguration" "true"
    # Suppress an error in Xorg log
    Option      "ConnectToAcpid" "Off"
EndSection

# Dummy for headless mode

Section "Device"
    Identifier  "Dummy0"
    Driver      "dummy"
    VideoRam    16384
EndSection

Section "Monitor"
   Identifier   "Monitor0"
   HorizSync    5.0-1000.0
   VertRefresh  5.0-200.0
   Modeline     "1280x800" 24.15 1280 1312 1400 1432 800 819 822 841
EndSection

Section "Screen"
   Identifier   "Screen0"
   Monitor      "Monitor0"
   Device       "Dummy0"
   DefaultDepth 24
   SubSection   "Display"
       Depth    24
       Virtual  1280 800
   EndSubSection
EndSection