   freeglut - unable to create direct context rendering
  Hi guys,I just started to play a little with some opengl examples and worked out to compile everything etc .. no problem there, the program even works and shows what I tried to render. So far so good. But I get the following message while starting the program:freeglut (./versuch1): Unable to create direct context rendering for window 'Versuch1'This may hurt performance.freeglut (./versuch1): Unable to create direct context rendering for window 'freeglut menu'This may hurt performance.And it doesn't have a window-frame .. just a black square with my scene, no min,max buttons, no captionbar, nothing what a normal window has. I'm using Ubuntu 8.10 and 9.04 (two pcs, two different graphic cards, same problem) any idea?Thanks in advance!   