Java no x11 variable error but no remote setup

[Shoxx98]

when attempting to launch arduino without any options, im getting this error:

Picked up JAVA_TOOL_OPTIONS: 
java.awt.HeadlessException: 
No X11 DISPLAY variable was set,
or no headful library support was found,
but this program performed an operation which requires it,

	at java.desktop/java.awt.SplashScreen.getSplashScreen(Unknown Source)
	at processing.app.Base.<init>(Base.java:240)
	at processing.app.Base.main(Base.java:150)

I have tried searching for the issue but it seems like no one encountered this on manjaro yet.
I am on newest versions on everything.
Please help me fix this issue

[andreas85]

@Shoxx98

No X11 DISPLAY variable was set,
or no headful library support was found,
but this program performed an operation which requires it,

You need to:

• Run this script inside a terminal (not tty)
• You need to be loged in as user in this terminal (not root)
• Set X11DISPLAY in bash and export it
• Have any java (jdk/jre) installed (not only headless)

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[Mirdarthos]

@andreas85

Set X11 in bash and export it

I think it’s actually the $DISPLAY variable:

$ echo $X11

$ echo $DISPLAY
:0

[Shoxx98]

My responses to your bullet points:

• Im running gnome and used their terminal to launch arduino
• i was logged in while running the command
• Ill have to look into this one
• I have jre-openjdk installed (11,17 and 8), as well as the headless versions

[Shoxx98]

I got the same outputs

[Mirdarthos]

Then it seems that environment variable isn’t globally set. I don’t know how else to put it.

You might try that following. Not sure if it’ll work, but it’s easy to undo if it doesn’t:

Append the line:

DIAPLAY=:0

…to the bottom of your ~/.zshrc file, if you use zsh, or ~/.bashrc file, if you’re using bash.

Then you can try again.

If it doesn’t help, simply remove that ling from where you added it. And know that I obviously don’t know where to go from here…

[Shoxx98]

I have both files so I tried both with reboots after setting the variables.
Nothing worked or got me any other error

[Mirdarthos]

Hmmm…

I think you need to do X forwarding over SSH if that’s what you’re trying to achieve? But I’m not sure what you’re trying to accomplish, and neither have I any experience with X11 forwarding if it is indeed it…

So

[andreas85]

@Shoxx98

I have jre-openjdk installed (11,17 and 8), as well as the headless versions

But which of them is active(default) ?

archlinux-java status

Available Java environments:
  java-11-openjdk
  java-17-openjdk
  java-20-graalvm
  java-21-openjdk (default)
  java-21-openjdk-bin
  java-22-openjdk
  java-8-openjdk

echo $DISPLAY

:1.0

java -version

openjdk version "21" 2023-09-19
OpenJDK Runtime Environment (build 21+35)
OpenJDK 64-Bit Server VM (build 21+35, mixed mode, sharing)

[Shoxx98]

I don’t want to do anything SSH-related.
I want to run the arduino IDE on my local machine.

[Shoxx98]

@andreas85

But which of them is active(default)

Available Java environments:
 java-11-openjdk
 java-17-openjdk
 java-21-openjdk (default)
 java-8-openjdk/jre

seems like I missed 21 on that list

@andreas85

echo $DISPLAY

:1.0

will changing the display variable do something to my ability to boot my pc correctly?

@andreas85

java -version

openjdk version "21" 2023-09-19
OpenJDK Runtime Environment (build 21+35)
OpenJDK 64-Bit Server VM (build 21+35, mixed mode, sharing)

openjdk version "21" 2023-09-19
OpenJDK Runtime Environment (build 21+35)
OpenJDK 64-Bit Server VM (build 21+35, mixed mode, sharing)

[andreas85]

@Shoxx98

will changing the display variable do something to my ability to boot my pc correctly?

When you invoke a terminal inside a DE, every java-program launched from the terminal can work inside the terminal.
If the DISPLAY variable is set, the java-program is able to connect to your desktop, and can launch a GUI and interact with it. (Like writing into and reading clipboard, and doing D&D)

This will not affect booting

https://bbs.archlinux.org/viewtopic.php?id=97763

The DISPLAY environment variable should be set by whatever program or script has started the X server. Setting DISPLAY in .bashrc, or any other shell startup script, is a recipe for trouble.

Yes, that last part is one reason that setting DISPLAY in .bashrc is bad: DISPLAY is supposed to indicate the address of your current X server, which will not always be :0.

[Shoxx98]

@andreas85

echo $DISPLAY

:1.0

echo $DISPLAY
:1.0

arduino 
Picked up JAVA_TOOL_OPTIONS: 
java.awt.HeadlessException: 
No X11 DISPLAY variable was set,
or no headful library support was found,
but this program performed an operation which requires it,

	at java.desktop/java.awt.SplashScreen.getSplashScreen(Unknown Source)
	at processing.app.Base.<init>(Base.java:240)
	at processing.app.Base.main(Base.java:150)

[Shoxx98]

if the devs wrote their error detection well, I would think that it just cant see the display variable or detect any java version thats installed

[andreas85]

@Shoxx98

or detect any java version thats installed

No it did detect java, because the error comes out of java

But it may be a headless(non-gui) java version which is not able to connect to the display.

@Shoxx98

java.awt.HeadlessException: 

What about something like:

echo "DISPLAY=$DISPLAY" ; java -version; export DISPLAY ; arduino;

P.S. arduino does work in my pc (xfce, java21)

 cat /usr/bin/arduino

#!/bin/sh
export PATH=/usr/lib/jvm/java-8-openjdk/bin/:"$PATH"
exec /usr/share/arduino/arduino "$@"

Even /usr/share/arduino/arduino works for me even better with java21

[Shoxx98]

@andreas85

echo "DISPLAY=$DISPLAY" ; java -version; export DISPLAY ; arduino;

DISPLAY=:1.0
openjdk version "21" 2023-09-19
OpenJDK Runtime Environment (build 21+35)
OpenJDK 64-Bit Server VM (build 21+35, mixed mode, sharing)
Picked up JAVA_TOOL_OPTIONS: 
java.awt.HeadlessException: 
No X11 DISPLAY variable was set,
or no headful library support was found,
but this program performed an operation which requires it,

	at java.desktop/java.awt.SplashScreen.getSplashScreen(Unknown Source)
	at processing.app.Base.<init>(Base.java:240)
	at processing.app.Base.main(Base.java:150)

[medmedin]

From terminal, run:

1. sudo pacman -S arduino jdk8-openjdk
2. sudo archlinux-java set java-8-openjdk
3. env GDK_BACKEND=x11 arduino