Je suis revenu au driver openchrome. J'ai réussi à avoir un affichage correcte! J'ai rajouté une section Modes et Monitor dans mon fichier xorg.
Voici mon fichier xorg.conf pour une résolution de 1024x600 avec le driver openchrome
#Xorg configuration
Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "InputDevice"
# keyboard added by rhpxl
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "ch"
Option "XkbVariant" "fr"
EndSection
Section "Modes"
Identifier "HP-2133 LCD Modes"
# Default mode "1280x768": 80.1 MHz, 47.7 kHz, 60.0 Hz
Modeline "1280x768-60.0" 80.14 1280 1344 1480 1680 768 769 772 795
# Default mode "1280x720": 74.6 MHz, 44.2 kHz, 59.2 Hz
Modeline "1280x720-59.2" 74.60 1280 1341 1474 1688 720 721 724 746 -hsync +vsync
# Default mode "1024x768": 65.0 MHz, 48.4 kHz, 60.0 Hz
Modeline "1024x768-60.0" 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync
# Default mode "1024x600": 49.0 MHz, 37.3 kHz, 60.0 Hz
Modeline "1024x600-60.0" 48.96 1024 1064 1168 1312 600 601 604 622 -hsync +vsync
EndSection
Section "Monitor"
Identifier "Monitor0"
ModelName "LCD Panel"
HorizSync 31.5 - 50.0
VertRefresh 56.0 - 65.0
Option "dpms"
UseModes "HP-2133 LCD Modes"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "openchrome"
Option "AccelMethod" "EXA"
Option "ExaNoComposite" "True"
Option "MigrationHeuristic" "greedy"
Option "ExaScratchSize" "8192"
Option "MaxDRIMem" "16384"
Option "XaaNoImageWriteRect"
Option "SWCursor"
Option "PanelSize" "1024x600"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
#Virtual 1024 600
Depth 24
Modes "1024x600"
EndSubSection
EndSection