Bonjour, I can see on the page: http://rpm.livna.org/livna-switcher.html <cite> You can also use this tool manually if you want to temporarily switch back to the XFree86 driver without uninstalling the Nvidia driver. Just run "/usr/sbin/nvidia-config-xfree86 disable" to revert back to the XFree86 driver. The effects of running with the "enable" argument is left as an exercise to the reader. :-) </cite> I can read in the script /etc/rc.d/init.d/nvidia from package nvidia-glx-1.0.6106-0.lvn.4.1: <cite> #!/bin/sh # nvidia: Enable/Disable nvidia driver in XF86Config # # chkconfig: 2345 98 02 # description: This script will check if the nvidia kernel module is present \ # for the running kernel modify the XF86Config to the 'best' config # processname: nvidia # Source function library. . /etc/rc.d/init.d/functions exec="/usr/sbin/nvidia-config-xfree86" </cite> But where is this /usr/sbin/nvidia-config-xfree86 program? I can't find it nowhere in my machine... so the use of nvidia drivers is impossible!!! /var/log/messages <cite> Aug 22 01:15:03 totoche nvidia: Checking for nvidia kernel module succeeded Aug 22 01:15:03 totoche nvidia-config-xfree86: execvp: Aucun fichier ou répertoire de ce type Aug 22 01:15:03 totoche nvidia: Enabling nvidia driver failed </cite> I asked yum to install kernel-nvidia drivers and it did it installing also nvidia-glx-1.0.6106-0.lvn.4.1 package in order to satisfy the dependancies... but the /usr/sbin/nvidia-config-xfree86 is missing: where do I find it?? Thank you. -- François Patte Ecole française d'Extrême-Orient - Pune - Inde Université René Descartes - Paris 5 UFR de mathématiques et informatique http://www.math-info.univ-paris5.fr/~patte