Bug 1213074

Summary:	A java optifine installer bug.
Product:	[openSUSE] openSUSE Tumbleweed	Reporter:	Gregor Podjed <gregor.podjed>
Component:	Java	Assignee:	E-mail List <java-maintainers>
Status:	RESOLVED INVALID	QA Contact:	E-mail List <qa-bugs>
Severity:	Minor
Priority:	P5 - None	CC:	Andreas.Stieger
Version:	Current
Target Milestone:	---
Hardware:	64bit
OS:	openSUSE Tumbleweed
Whiteboard:
Found By:	Customer	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Gregor Podjed 2023-07-06 12:56:14 UTC

I tried installing optifine using the following command: sudo java -jar preview_OptiFine_1.20.1_HD_U_I5_pre7.jar. It gave the following error: java.awt.HeadlessException: 
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)
	at java.awt.Window.<init>(Window.java:536)
	at java.awt.Frame.<init>(Frame.java:420)
	at java.awt.Frame.<init>(Frame.java:385)
	at javax.swing.JFrame.<init>(JFrame.java:189)
	at optifine.InstallerFrame.<init>(InstallerFrame.java:55)
	at optifine.InstallerFrame.main(InstallerFrame.java:115)
Exception in thread "main" java.awt.HeadlessException: 
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)
	at java.awt.Window.<init>(Window.java:536)
	at java.awt.Frame.<init>(Frame.java:420)
	at java.awt.Frame.<init>(Frame.java:385)
	at javax.swing.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1763)
	at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1838)
	at javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1696)
	at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:863)
	at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:666)
	at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:637)
	at optifine.InstallerFrame.main(InstallerFrame.java:138)
Does this mean I need to set a X11 display variable? If so, how do I do it?

Comment 1 Andreas Stieger 2023-07-06 13:58:00 UTC

Yes, this means that you are trying to run a graphical program in a non-graphical environment. If you do have a graphical environment, "sudo" may swallow it. Use "su -", or "ssh -X" if using ssh. You need of course an X server on the host or the remote side. This may help: https://www.simplified.guide/ssh/x11-forwarding-as-root

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