need graphics server to register?

[Migrated From Jforum.net]

Just finished installing Jforum on my headless linux server. When clicking the 'register' link, I get this error:


An error has ocurred. For detailed stack trace, please see the page's source code.
Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.

The Tomcat log has this stack trace:

Caused by: com.octo.captcha.CaptchaException: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
        at com.octo.captcha.image.gimpy.GimpyFactory.getImageCaptcha(GimpyFactory.java:547)
        at com.octo.captcha.image.gimpy.GimpyFactory.getImageCaptcha(GimpyFactory.java:515)
        at com.octo.captcha.engine.image.ListImageCaptchaEngine.getNextImageCaptcha(ListImageCaptchaEngine.java:559)
        at net.jforum.entities.UserSession.createNewCaptcha(UserSession.java:347)
        at net.jforum.view.forum.UserAction.insert(UserAction.java:142)
        ... 35 more
Caused by: java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
        at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
        at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:134)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
        at com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.getFont(RandomFontGenerator.java:496)
        at com.octo.captcha.component.image.fontgenerator.TwistedRandomFontGenerator.getFont(TwistedRandomFontGenerator.java:495)
        at com.octo.captcha.component.image.fontgenerator.TwistedAndShearedRandomFontGenerator.getFont(TwistedAndShearedRandomFontGenerator.java:494)
        at com.octo.captcha.component.image.wordtoimage.ComposedWordToImage.getFont(ComposedWordToImage.java:559)
        at com.octo.captcha.component.image.wordtoimage.AbstractWordToImage.getAttributedString(AbstractWordToImage.java:528)
        at com.octo.captcha.component.image.wordtoimage.AbstractWordToImage.getImage(AbstractWordToImage.java:512)
        at com.octo.captcha.image.gimpy.GimpyFactory.getImageCaptcha(GimpyFactory.java:544)

Any ideas?
[originally posted on jforum.net by Anonymous]

[Migrated From Jforum.net]

Ah, figured it out. I turned off the 'Captcha' functionality in the admin tool.

[originally posted on jforum.net by Anonymous]

[Migrated From Jforum.net]

Take a look in this post:

https://coderanch.com/t/574500

Rafael
[originally posted on jforum.net by Rafael Steil]

[Migrated From Jforum.net]

Thanks for the info, Rafael. I've decided to just run headless and disable Captcha. This will also disallow avatars, evidently, but I can live with that.

I still have the issue ( in the other thread - https://coderanch.com/t/575213 ) where I am having a problem with disallowing Anonymous posts for a specific forum. Can you help with that?

Thanks,
Pat
[originally posted on jforum.net by heehaw]