Tt est ds le titre et je précise que j’ai un P4 et que le “recommandé” est bien le … -686 
J’ai chargé un “nvidia” à la place du ‘nv’ et j’ai donc laissé le "dri " de côté.
Là je suis sous 2.6.18-4-486 avec exactement la m^ config et tt fonctionne à merveille.
Voilà mon xorg, y-a-t-il qq chose qui cloche ?
[code]Section "Module"
Load "bitmap"
Load "ddc"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "vbe"
EndSection
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option “XkbRules” "xorg"
Option “XkbModel” "pc105"
Option “XkbLayout” "fr"
Option “XkbVariant” "latin9"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option “Device” "/dev/input/mice"
Option “Protocol” "ImPS/2"
Option “Emulate3Buttons” "true"
EndSection
Section "Device"
Identifier "nVidia Corporation NV44A [GeForce 6200]"
Driver "nvidia"
BusID "PCI:1:0:0"
EndSection
Section "Monitor"
Identifier "FUJITSU TE77"
Option "DPMS"
HorizSync 30-68
VertRefresh 50-85
EndSection
Section "Screen"
Identifier "Default Screen"
Device "nVidia Corporation NV44A [GeForce 6200]"
Monitor "FUJITSU TE77"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes “1280x1024” “1280x768” “1200x800” “1152x864” “1152x768” "1024x768"
EndSubSection
SubSection "Display"
Depth 4
Modes “1280x1024” “1280x768” “1200x800” “1152x864” “1152x768” "1024x768"
EndSubSection
SubSection "Display"
Depth 8
Modes “1280x1024” “1280x768” “1200x800” “1152x864” “1152x768” "1024x768"
EndSubSection
SubSection "Display"
Depth 15
Modes “1280x1024” “1280x768” “1200x800” “1152x864” “1152x768” "1024x768"
EndSubSection
SubSection "Display"
Depth 16
Modes “1280x1024” “1280x768” “1200x800” “1152x864” “1152x768” "1024x768"
EndSubSection
SubSection "Display"
Depth 24
Modes “1280x1024” “1280x768” “1200x800” “1152x864” “1152x768” "1024x768"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection
Section “DRI”
Mode 0666
EndSection[/code]
Et voilà la partie du log concernée
Mar 9 00:37:41 localhost kdm: :0[2779]: IO Error in XOpenDisplay
Mar 9 00:37:41 localhost kdm[2735]: X server for display :0 terminated unexpectedly
Mar 9 00:37:41 localhost kdm[2735]: Display :0 cannot be opened
Mar 9 00:37:41 localhost kdm[2735]: Unable to fire up local display :0; disabling.
Mar 9 00:38:10 localhost shutdown[2816]: shutting down for system halt
Mar 9 00:38:10 localhost init: Switching to runlevel: 0
Mar 9 00:38:13 localhost avahi-daemon[2495]: Got SIGTERM, quitting.
Mar 9 00:38:13 localhost avahi-daemon[2495]: Leaving mDNS multicast group on interface eth1.IPv4 with address 82.253.241.155.
Mar 9 00:38:13 localhost avahi-daemon[2495]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.3.1.
Mar 9 00:38:13 localhost ddclient[2505]: WARNING: caught SIGTERM; exiting
Mar 9 00:38:16 localhost rpc.statd[2684]: Caught signal 15, un-registering and exiting.
Mar 9 00:38:16 localhost kernel: Kernel logging (proc) stopped.
Mar 9 00:38:16 localhost kernel: Kernel log daemon terminating.
Mar 9 00:38:17 localhost exiting on signal 15
RÉSOLU :
j’avais tt simplement oublié d’installer le nvidia-kernel qui_va_bien 
C’est en lisant une précision du petit Chat Noir, que j’ai vérifié si j’avais tt bien installé. Ô rage, ô désespoir … putain de neurone qui fout le camp et dire que c’était le dernier. 