Posted by gouessej on May 13, 2019; 6:19pm
URL: https://forum.jogamp.org/JOGL-demo-and-other-apps-show-only-black-canvas-window-tp4039768p4039773.html

I'm absolutely sure that you're affected by a bug we fixed "recently" as you use Mesa 18 under GNU Linux. However, the symptom seems to be different. Does glxgears work on your machine?