Hi Vamshi,

this means that you have to configure your X server. Depending on your
version of XFree86 and your graphics card there are several things to
consider. For example, if your are running XFree 4.0 or later, there
should be a 'Load "glx"' statement in your XF86Config. But there are
too many issues to discuss them here.

If you are new to Linux I would suggest getting a recent Linux
distribution. Most of them should configure things correctly now.

Regards,
Ingo

> Hi,
> I am new to the field of 3D programming.
> I am working on Linux environment and have installed java1.2.2
> (JDK) earlier. Now I have installed java3D API fron the
> sun.java.com for linux.
> I wanted to check the correctness of the installation and I ran
> HelloUniverse.
> I get the following error.
>
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Xlib:  extension "GLX" missing on display ":0.0".
> Exception in thread "main" java.lang.NullPointerException
>         at HelloUniverse.main(HelloUniverse.java, Compiled Code)
>
> And I tried to run the sample programs by clicking on the links in
> the index.html.
> But it says applet not initialized.
> I haven't installed Java 2D API. Is it necessary??
> Please let me know what I should do to get this working.
>
> Thank you
> Regards
> Vamshi

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