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--- other:x_conf [2022/08/05 11:02] – [Testing] jypeter
+++ other:x_conf [2022/08/05 15:35] – [Troubleshooting] Added the "Nothing works" section jypeter
@@ Line 77: / Line 77: @@
 ===== Testing =====
-  * Check the machine name, and check if the ''DISPLAY'' variable is defined
+The idea is to:
-    * You should get something similar to the following if you are connected with ''ssh -X'' or ''ssh -Y''\\ <code>$ hostname
+  * Open a terminal and check that the ''DISPLAY'' environment variable is correctly defined on the local machine
-ciclad-ng.private.ipsl.fr
+  * Connect to the remote machine
+  * Check that a (new) ''DISPLAY'' variable is defined on the remote machine
+  * Check that you can start an application using graphics (e.g. ''xterm'') on the remote machine
-$ echo $DISPLAY
+==== On a Linux computer ====
-localhost:68.0
-</code>
+Some basic commands in a terminal
-    * You should get something similar to the following if you are using WSL\\ <code>$ echo $DISPLAY
-SOMETHING
+<code>[Local] $ hostname
-</code>
+name_of_your_local_machine
-      * Otherwise, type ''export DISPLAY=localhost:0.0''
-  * Type ''xterm'' and check that a new //xterm// terminal appears (it may appear //iconified//)
+[Local] $ echo $DISPLAY
-    * FIXME
+:0
+[Local] $ ssh -X some_login@some_remote_server
+[some connection information skipped here]
+[Remote] $ hostname
+name_of_the_remote_server
+[Remote] $ echo $DISPLAY
+localhost:20.0
+[Remote] $ xterm</code>
+==== On a Windows computer with only an X server installed ====
+We just open a ''Powershell'' window (''Start'' => ''Windows Powershell'' => ''Windows Powershell'') and type some basic commands
+<code>PS C:\> $env:computername
+name_of_your_local_machine
+PS C:\> $env:DISPLAY
+PS C:\> $env:DISPLAY="localhost:0"
+PS C:\> $env:DISPLAY
+localhost:0
+PS C:\> ssh -Y some_login@some_remote_server
+Warning: No xauth data; using fake authentication data for X11 forwarding.
+[some connection information skipped here]
+[Remote] $ hostname
+name_of_the_remote_server
+[Remote] $ echo $DISPLAY
+localhost:19.0
+[Remote] $ xterm</code>
+==== On a Windows computer with PuTTY and an X server installed ====
+We assume here that [[other:putty_conf|PuTTY is already installed and configured]]
+We just have to open a pre-configured //Session// on a remote server
+<code>[Remote] $ hostname
+name_of_the_remote_server
+[Remote] $ echo $DISPLAY
+localhost:19.0
+[Remote] $ xterm</code>
+==== On a Windows computer with WSL+Linux and an X server installed ====
+  * FIXME ''export DISPLAY=localhost:0.0''
 ===== Troubleshooting =====
+==== Nothing works! ====
+That's unfortunate, but:
+  * Have you turned on your computer?
+  * Do you have network access, and an account on a remote server?
+  * Have you run the [[other:x_conf#testing|Tests]]?
+  * Have you installed and configured the //X server// correctly? Is it really running?
+  * Have you configured [[other:putty_conf|PuTTY]] and/or other required applications correctly ?
+  * Is the ''DISPLAY'' variable defined correctly on the local and remote computer?
 ==== OpenGL related settings ====