Il y a un léger mieux. Si je supprime "xorg.conf", je lance X par la commande : # tdm start (bureau tde-trinity), je passe en mode graphique mais ultra basique, avec une petite résolution.
# nvidia-settings voici le message reçu : "You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server". # nvidia-xconfig" il me créé "xorg.conf" mais ensuite impossible de lancer X. Il faut le supprimer pour passer au bureau graphique. Fichier ".xessions-errors" : ERROR: nvidia-settings could not find the registry key file. This file should have been installed along with this driver at /usr/share/nvidia/nvidia-application-profiles-key-documentation. The application profiles will continue to work, but values cannot be preopulated or validated, and will not be listed in the help text. Please see the README for possible values and descriptions. /var/log/Xorg.0.log : XINPUT: Adding extended input device "Dell Dell USB Entry Keyboard" (type: KEYBOARD, id 9) [ 1133.863] (**) Option "xkb_rules" "evdev" [ 1133.863] (**) Option "xkb_model" "pc105" [ 1133.863] (**) Option "xkb_layout" "fr" [ 1133.863] (**) Option "xkb_variant" "latin9" [ 1133.867] (EE) FBDEV(0): FBIOBLANK: Invalid argument [ 1137.020] (EE) FBDEV(0): FBIOBLANK: Invalid argument. Voilà le topo, il semble que le pilote NVIDIA de Debian soit mal installé... Merci, André