Hi,

for a progressive rendering algorithm I need the swapBuffers() function, which should work in the new release.
Unfortunately, when I try to use swapBuffers() in a really simple
context (just some geometry and the swap afterwards) it crashes in the display() after calling:
drawable.setAutoSwapBufferMode( false );  
drawable.swapBuffers();

I essentially want to make sure the swapping works fine, before I change
my whole system from gl4java to jogl.
What am I doing wrong? Is it not ok to use swapBuffers() in the
display function?
I am running Linux Redhat 9 and the jogl release from 29th of April.

output:
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0x4D0F6A77
Function=XQueryExtension+0x17
Library=/usr/X11R6/lib/libX11.so.6

Current Java thread:
     at net.java.games.jogl.impl.x11.GLX.glXMakeCurrent(Native Method)
     at net.java.games.jogl.impl.x11.X11GLContext.free(X11GLContext.java:165)
     - locked <0x445f6ca0> (a net.java.games.jogl.impl.x11.X11OnscreenGLContext)
     at net.java.games.jogl.impl.x11.X11OnscreenGLContext.free(X11OnscreenGLContext.java:133)
     - locked <0x445f6ca0> (a net.java.games.jogl.impl.x11.X11OnscreenGLContext)
     at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:271)
     - locked <0x445f6ca0> (a net.java.games.jogl.impl.x11.X11OnscreenGLContext)
     at net.java.games.jogl.GLCanvas.displayImpl(GLCanvas.java:186)
     at net.java.games.jogl.GLCanvas.display(GLCanvas.java:74)
     at net.java.games.jogl.GLCanvas.paint(GLCanvas.java:81)
     at sun.awt.RepaintArea.paint(RepaintArea.java:177)
     at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:405)
     at java.awt.Component.dispatchEventImpl(Component.java:3678)
     at java.awt.Component.dispatchEvent(Component.java:3477)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

Thanks for your help.
cheers,
kristian

How can I implement a progressive rendering without
a swap buffers support in Jogl (I read somewhere in this forum
that this is not supported yet.)? Or is there another possiblity to
do this? (I used GL4java before, where this is supported but like to switch
to Jogl because of the nvidia cg support)

thanks,
kristian