VM error running nehe lesson#1

[f.l.x]

i'm trying to run the code of the first nehe opengl tutorials

everything goes well until i close the window, then the vm crashes with the following message

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# # An unexpected error has been detected by HotSpot Virtual Machine: # #  SIGSEGV (0xb) at pc=0xb1993198, pid=9330, tid=2981018544 # # Java VM: Java HotSpot(TM) Client VM (1.5.0_05-b05 mixed mode, sharing) # Problematic frame: # C  0xb1993198 # # An error report file with more information is saved as hs_err_pid9330.log # # If you would like to submit a bug report, please visit: #   http://java.sun.com/webapps/bugreport/crash.jsp #

hs_err_pid9330.log attached for it could be of some use

[f.l.x]

well, it seems to be caused by a Display.destroy() call on exit, commenting that line prevents the vm to crash, but is it safe? can i exit a lwgl program without destroying the display?

pardon my noobnes, both with lwgl and with opengl at all :p

[kevglass]

Which version of LWJGL are you using?

Kev

Games published by our own members! Check 'em out!

[f.l.x]

0.99, downloaded today

[edit] nevermind i was importing the wrong "DisplayMode" :S [/edit]
one more oditie, rewriting this tutorial miself, i get the DisplayModes as follows

1	DisplayMode[] modes = Display.getAvailableDisplayModes();

but i get this compilation problem

1	Type mismatch: cannot convert from DisplayMode[] to DisplayMode[]

[f.l.x]

I'm still getting this error sometimes

this is my code, the vm crashes when i don't select any display mode in my selector, say, when the display is not set nor created.

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public class Tutorial_1 implements Runnable{    public boolean running = true, presionando_f1;    private DisplayMode displayMode;    /**     * @param args     */    public static void main(String[] args) {       new Tutorial_1();       System.err.println("exiting...");    }        public Tutorial_1(){       createWindow(false);       run();    }        private void createWindow(boolean fullscreen){//init the window      try{          Display.setFullscreen(fullscreen);          DisplayMode[] modes = Display.getAvailableDisplayModes();                    //This shows a dialog to let you choose a display mode         int opcion = JOptionPane.showOptionDialog(null, "Select a display mode", "!",                JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE,                null, modes, 0);          if(opcion != JOptionPane.CLOSED_OPTION) {//If you have selected an option...            displayMode = modes[opcion];             Display.setDisplayMode(displayMode);             Display.setTitle("Tutorial 1 de Opengl con LWGL");             Display.create();                      } else {//else, we won't loop on the run() method            //System.exit(0); // Commented to avoid vm-crash (but i still get them), i'll use this instead            running = false;          }                 }catch(LWJGLException e){          e.printStackTrace();          System.exit(1);       }    }        public void run(){       while(running){          if(Display.isCloseRequested()){//Exits if requested            running = false;          }       }    } }

thanks for the help, i'm off to a good start and i want to know where do this errors come to avoid them in further projects 

[Matzon]

nvidia issue, fixed in cvs by not unloading OpenGL

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Index: GLContext.java =================================================================== RCS file: /cvsroot/java-game-lib/LWJGL/src/java/org/lwjgl/opengl/GLContext.java,v retrieving revision 1.53 retrieving revision 1.54 diff -u -d -r1.53 -r1.54 --- GLContext.java   29 Aug 2005 20:14:59 -0000   1.53 +++ GLContext.java   12 Jan 2006 12:25:12 -0000   1.54 -320,7 +320,11 @@     /** The OpenGL library reference count is decremented, and if it reaches 0, the library is unloaded. */     public static synchronized void unloadOpenGLLibrary() {        gl_ref_count--; -      if ( gl_ref_count == 0 ) +      /* +       * Unload the native OpenGL library unless we're on linux, since +       * some drivers (NVIDIA proprietary) crash on exit when unloading the library. +       */ +      if (gl_ref_count == 0 && LWJGLUtil.getPlatform() != LWJGLUtil.PLATFORM_LINUX)           nUnloadOpenGLLibrary();     }

[f.l.x]

wow, thanks!
you are doing a grat job with lwgl