Posted by gouessej on Oct 28, 2015; 2:26pm
URL: https://forum.jogamp.org/JOGL-2-support-for-Ardor3D-JMonkeyEngine-3-jzy3d-and-NiftyGUI-tp1706747p4035643.html

Please call glutSolidTeapot and gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL2GL3.GL_LINE); in this program:
https://gist.github.com/gouessej/3420e2b6f632efdddf98

Then, replace the GLCanvas by GLJPanel and let me know whether you reproduce your bug.