Frame freezes while the Glut menu is visible

Hello

I have a problem with glut and menus. When the menu is visible the frame freezes. I have tested this for Windows and Linux.

While seaching for an answer this issue is mentioned in the win32 readme, http://www.xmission.com/%7Enate/glut/README-win32.txt

But how can this done for Linux?

Regards

Thor Henning Amdahl