antonio montagnani wrote: > Where in my xorg file??????? and why is GLX line not included > automatically??? To answer the first question, seems like your xorg.conf doesn't have Module section by default. Add the following at the start of your xorg.conf file Section "Module" Load "glx" EndSection Now, for your second question. You have installed a package from a 3-rd party repository (freshrpms or livna) with software intentionally left out of the distribution since the source for it is not available making support close to impossible. This is not a supported configuration and therefore you cannot expect required X config sections to just magically be there. You should have read the documentation packaged with the nvidia drivers and acted accordingly.