Differences

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--- infrastructure:vnc [2021/12/09 11:21] – [Method for Ubuntu 20.04] pmania
+++ infrastructure:vnc [2022/04/13 13:18] (current) – [Vncviewer after Reboot] s_fuyedc
@@ Line 112: / Line 112: @@
 sudo apt-get update
 sudo apt-get install tigervnc-viewer
+vncviewer
 </code>
 In the tigervnc-viewer, first open the options and set the compression to 'auto'.
-Afterwards, you can enter 'localhost' in the connection dialog and hit Connect.
+Afterwards, you can enter '**localhost**' in the connection dialog and hit Connect.
+Please note: Please __do not__ enter the IP address of your remote machine here, but really 'localhost'. This works, because we have a SSH tunnel running (see above).
+**Important: Once after every reboot, a user must log in to the server on site, because the virtual display is only launched after the first user's login.** This is similar to the 18.04 method mentioned above.
+====Vncviewer after Reboot====
+Tested with GDM3 (20.04 default display manager).
+After reboot the desired display :1 is not loaded until you logged in on display :0. We need to connect to display :0 once after rebooting. With x11vnc you can easily open :0. A newly set-up system needs one UI login to establish general display settings.
+<code>
+# on the remote machine
+sudo apt-get update
+sudo apt-get install x11vnc
+</code>
+Get onto the remote machine and look for the Xauthority file in /run/user/
+<code>
+# on the remote machine
+sudo find /run/user/ -name Xauthority
+</code>
+This will yield at least two paths, one with a 4-digit named directory, and another with 3 digits. We need the path with 3-digits. Now from the client you can launch x11vnc similar to the x0vncserver. Specify the path to Xauthority and replace '125' with yours.
+<code>
+# on your client machine
+ssh USERNAME@REMOTE.SERVER.IP -t -t -L 5900:localhost:5900 \
+  "sudo x11vnc -display :0 -auth /run/user/125/gdm/Xauthority"
+</code>
+Connect to x11vnc with vncviewer, it will show the login display :0. After login, close the connection  and use x0vncserver to launch display :1.