Configuration de xorg.conf

Ma carte graphique est une ATI X1400
J'ai eu une détection automatique de ma carte graphique, puis une mise à jour des pilotes, par contre tout est en mode généric dans mon fichier /etc/X11/xorg.conf, j'ai donc reconfiguré comme suit:

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
Fontpath "/usr/share/X11/fonts/misc"
Fontpath "/usr/share/X11/fonts/cyrillic"
Fontpath "/usr/share/X11/fonts/100dpi/:unscaled"
Fontpath "/usr/share/X11/fonts/75dpi/:unscaled"
Fontpath "/usr/share/X11/fonts/Type1"
Fontpath "/usr/share/X11/fonts/100dpi"
Fontpath "/usr/share/X11/fonts/75dpi"
# path to defoma fonts
Fontpath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
Load "i2c"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
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" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "stylus"
Option "Device" "/dev/wacom"# Change to
Option "Type" "stylus"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
# /dev/input/event
# for USB
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "eraser"
Option "Device" "/dev/wacom"# Change to
Option "Type" "eraser"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
# /dev/input/event
# for USB
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "cursor"
Option "Device" "/dev/wacom"# Change to
Option "Type" "cursor"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
# /dev/input/event
# for USB
EndSection

Section "Device"
Identifier "ATI Technologies, Inc. ATI Default Card"
Driver "fglrx"
Busid "PCI:1:0:0"
EndSection

Section "Monitor"
Identifier "Écran générique"
Option "DPMS"
Horizsync 28-64
Vertrefresh 43-60
EndSection

Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies, Inc. ATI Default Card"
Monitor "Écran générique"
Defaultdepth 24
SubSection "Display"
Depth 1
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x800"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
screen "Default Screen"
Inputdevice "Generic Keyboard"
Inputdevice "Configured Mouse"
Inputdevice "stylus" "SendCoreEvents"
Inputdevice "cursor" "SendCoreEvents"
Inputdevice "eraser" "SendCoreEvents"
EndSection

Section "DRI"
Mode 0666
EndSection

Section "Extensions"
Option "Composite" "1"
EndSection

4. "Problème d'écran noir au démarrage d'ubuntu" / Résolu

Voici mon fichier /etc/usplash.conf d'origine
# Usplash configuration file
xres=1280
yres=1024

Ceci est apparement du au bug #150930

Pour y remédier:

- il faut changer la résolution en 1024x768
- Ajouter "defoptions=vga=791 quiet splash" dans /boot/grub/menu.lst à la ligne # defoptions=quiet splash
- lancer la commande: sudo update-initramfs -u -k `uname -r`

Tutoriel disponible sur le forum ubuntu-fr