Salut,
J'ai un problème similaire au tien.
Tu peux trouver mon post ici:
http://forums.archlinux.fr/post30845.html#p30845
J'ai une ATI 4870X2, et après un bug de X que j'ai réussi [à peu près] à corriger, les performances sont pas normales, comme si j'utilisais un autre driver que le propriétaire.
Or je ne vois pas où est l'erreur, voici mon xorg.conf:
Code : Tout sélectionner
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Type1"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "record"
Load "glx"
Load "dri"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "AccelMethod" # [<str>]
#Option "offscreensize" # [<str>]
#Option "SWcursor" # [<bool>]
#Option "ignoreconnector" # [<str>]
#Option "forcereduced" # [<bool>]
#Option "forcedpi" # <i>
#Option "useconfiguredmonitor" # [<bool>]
#Option "HPD" # <str>
#Option "NoRandr" # [<bool>]
#Option "RROutputOrder" # [<str>]
#Option "DRI" # [<bool>]
#Option "TVMode" # [<str>]
#Option "ScaleType" # [<str>]
#Option "UseAtomBIOS" # [<bool>]
#Option "AtomBIOS" # [<str>]
#Option "UnverifiedFeatures" # [<bool>]
#Option "Audio" # [<bool>]
#Option "HDMI" # [<str>]
#Option "COHERENT" # [<str>]
Identifier "Card0"
Driver "fglrx"
VendorName "ATI Technologies Inc"
BoardName "R700 [Radeon HD 4870 X2]"
BusID "PCI:3:0:0"
#"MetaModes" "max_écran_1-max_écran_2 min_écran_1-min_écran_2"
Option "MetaModes" "1920x1200-1280x1024 800x600-800x600"
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "AccelMethod" # [<str>]
#Option "offscreensize" # [<str>]
#Option "SWcursor" # [<bool>]
#Option "ignoreconnector" # [<str>]
#Option "forcereduced" # [<bool>]
#Option "forcedpi" # <i>
#Option "useconfiguredmonitor" # [<bool>]
#Option "HPD" # <str>
#Option "NoRandr" # [<bool>]
#Option "RROutputOrder" # [<str>]
#Option "DRI" # [<bool>]
#Option "TVMode" # [<str>]
#Option "ScaleType" # [<str>]
#Option "UseAtomBIOS" # [<bool>]
#Option "AtomBIOS" # [<str>]
#Option "UnverifiedFeatures" # [<bool>]
#Option "Audio" # [<bool>]
#Option "HDMI" # [<str>]
#Option "COHERENT" # [<str>]
Identifier "Card1"
Driver "fglrx"
VendorName "ATI Technologies Inc"
BoardName "R700 [Radeon HD 4870 X2]"
BusID "PCI:4:0:0"
#"MetaModes" "max_écran_1-max_écran_2 min_écran_1-min_écran_2"
Option "MetaModes" "1920x1200-1280x1024 800x600-800x600"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Virtual 3200 2224
# largeur 3200 = 1920 + 1280
# hauteur 2224 = 1200 + 1024
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Virtual 3200 2224
# largeur 3200 = 1920 + 1280
# hauteur 2224 = 1200 + 1024
EndSubSection
EndSection
Section "Extensions"
Option "Composite" "Enable"
EndSection
Section "DRI"
Mode 0666
EndSection
Postes ton xorg.conf, peut-être qu'on peut trouver une faute toute bête, ou alors ça peut éventuellement m'aider (trouver les points communs du fichier xorg.conf).
Personnellement, avant que j'ai le problème actuel, j'avais de mauvaises performances avec le driver radeon, et de normales avec le driver fglrx. Comme dit plus haut, vérifies l'installation du pilote,et éventuellement essaies le driver fglrx.