For best rendering performance it is imperative that hardware accelerated graphics are available on your system, and that an OpenGL driver, optimized for use with your graphics card, is installed. Under some operating systems, notably Linux, the hardware may be present, but the driver is absent (or misconfigured). The command below may be helpful on Linux systems for determining if your OpenGL driver is properly configured (look for the presence of either the nVidia or ATI vendor string, as appropriate for your hardware):
glxinfo | grep version
Note that Linux is notorious for uninstalling vendor-provided OpenGL drivers during OS upgrades
