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other:x_conf [2022/08/10 06:59] jypeter [Can't start a graphical application by clicking on its desktop shortcut] |
other:x_conf [2022/08/11 08:04] jypeter [On a Mac] Merged with the Linux section |
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* The **remote computer or server** is another computer that you also want to interact with (using the screen+mouse+keyboard of your local computer) | * The **remote computer or server** is another computer that you also want to interact with (using the screen+mouse+keyboard of your local computer) | ||
+ | * [[other:ssh#connecting_to_servers_commonly_used_by_lsce_users|Some servers used by LSCE users]] | ||
* We only consider on this page the case of a **remote //Linux// machine** that **requires a local running //X server//** | * We only consider on this page the case of a **remote //Linux// machine** that **requires a local running //X server//** | ||
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The idea is to: | The idea is to: | ||
- | * Open a terminal and check that the ''DISPLAY'' environment variable is correctly defined on the local machine | + | * Open a terminal and check that the ''DISPLAY'' environment variable is defined on the local machine |
* If we use [[other:win10wsl|WSL]], we also check that we can start an application using graphics in ''WSL'' | * If we use [[other:win10wsl|WSL]], we also check that we can start an application using graphics in ''WSL'' | ||
* Connect to the remote machine | * Connect to the remote machine | ||
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The test may fail, due to the [[other:x_conf#nothing_works|usually expected errors]] | The test may fail, due to the [[other:x_conf#nothing_works|usually expected errors]] | ||
- | ==== On a Linux computer ==== | + | ==== On a Linux computer or a Mac ==== |
- | Some basic commands in a terminal | + | Open a //terminal// ([[other:ssh#a_recommended_terminal_for_mac|terminal on a Mac]]) and use some basic commands to check things |
<code>[Local] $ hostname | <code>[Local] $ hostname | ||
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[Remote] $ xterm &</code> | [Remote] $ xterm &</code> | ||
- | ==== On a Mac ==== | ||
- | FIXME | ||
- | ===== Troubleshooting ===== | ||
- | ==== Can't start a graphical application by clicking on its desktop shortcut ==== | ||
- | Check the shortcut and run the command directly in a terminal to check the error message | ||
- | There is a good chance that [[other:x_conf#error_when_there_is_no_x_server_running|you have forgotten to start the X server!]] | + | ===== Troubleshooting ===== |
+ | |||
==== Nothing works! ==== | ==== Nothing works! ==== | ||
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* Have you configured [[other:putty_conf|PuTTY]] and/or other required applications correctly ? | * Have you configured [[other:putty_conf|PuTTY]] and/or other required applications correctly ? | ||
* Is the [[other:x_conf#what_is_an_x_server|DISPLAY variable]] defined correctly on the local and remote computer? | * Is the [[other:x_conf#what_is_an_x_server|DISPLAY variable]] defined correctly on the local and remote computer? | ||
+ | |||
+ | |||
+ | ==== Error when there is no X server running ==== | ||
+ | |||
+ | If the ''DISPLAY'' variable is defined, but there is **no X server**, you will get a ''Can't open display: localhost://[SOME VALUE]//'' error\\ <code>$ xterm & | ||
+ | xterm: Xt error: Can't open display: localhost:23.0</code> | ||
+ | |||
+ | Time to [[other:x_conf|read this page again]]... | ||
+ | |||
==== Error when DISPLAY is not defined correctly ==== | ==== Error when DISPLAY is not defined correctly ==== | ||
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Make sure that you are using ''ssh -X'' or ''ssh -Y'', or that [[other:putty_conf#changing_some_useful_settings|PuTTY is configured]] with ''Enable X11 forwarding'' | Make sure that you are using ''ssh -X'' or ''ssh -Y'', or that [[other:putty_conf#changing_some_useful_settings|PuTTY is configured]] with ''Enable X11 forwarding'' | ||
- | ==== Error when there is no X server running ==== | ||
- | If the ''DISPLAY'' variable is defined, but there is **no X server**, you will get a ''Can't open display: localhost://[SOME VALUE]//'' error\\ <code>$ xterm & | + | ==== Can't start a graphical application by clicking on its desktop shortcut ==== |
- | xterm: Xt error: Can't open display: localhost:23.0</code> | + | |
+ | Check the shortcut and run the command directly in a terminal to check the error message | ||
+ | |||
+ | There is a good chance that [[other:x_conf#error_when_there_is_no_x_server_running|you have forgotten to start the X server!]] | ||
- | Time to [[other:x_conf|read this page again]]... | ||
==== OpenGL related settings ==== | ==== OpenGL related settings ==== | ||