Dual Monitor Issues

[envirocbr]

have an Nvidia 8400GS installated (one VGA one DVi) and I have two Acer monitors (same size different model) one is attached VGA otehr DVI.

The dual graphic seems to work; however, it is MIRRORED! It is not a "spanning" desktop that I would prefer. I have checked around the Internet and have not found anything relative to help me. I tried to install the drive from nvidia but once I try to restart X it won't load and I have to revert back to my backup config which mirrors the desktop on both screens. (I can see myself typing on both screens.

Here is my xorg.conf file:

[root@enviro ~]# cat /etc/X11/xorg.conf
# Xorg configuration created by system-config-display

Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "nv"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

Any help or guidance is appreciated.

Thank you

[Rubberman]

Here is my /etc/X11/xorg.conf file that handles dual monitors in a xinerama (spanning) mode. You will need to modify the monitor and screen sections to suit your configuration.

# Xorg configuration created by system-config-display

Section "ServerLayout"
        Identifier     "Multihead layout"
        Screen      0  "Screen0" 0 0
        Screen      1  "Screen1" RightOf "Screen0"
        InputDevice    "Keyboard0" "CoreKeyboard"
        Option      "Xinerama" "on"
        Option      "Clone" "off"
EndSection

Section "Files"
#       ModulePath   "/usr/lib64/xorg/modules/extensions/nvidia"
#       ModulePath   "/usr/lib64/xorg/modules"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbModel" "pc105"
        Option      "XkbLayout" "us"
EndSection

Section "Monitor"
        Identifier   "Monitor0"
        ModelName    "Dell 2407WFP (Digital)"
        HorizSync    30.0 - 83.0
        VertRefresh  56.0 - 76.0
        Option      "dpms"
EndSection

Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "Monitor Vendor"
        ModelName    "Dell 2405FPW (Digital)"
        HorizSync    30.0 - 83.0
        VertRefresh  56.0 - 76.0
        Option      "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "nvidia"
        BusID       "PCI:7:0:0"
EndSection

Section "Device"
        Identifier  "Videocard1"
        Driver      "nvidia"
        BusID       "PCI:7:0:0"
        Screen      1
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1920x1200"
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "Videocard1"
        Monitor    "Monitor1"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1920x1200"
        EndSubSection
EndSection

Also, you should remove the packaged nvidia driver and get one from their web site. The ones in the yum package manager tend to be a bit dated.