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dual head display problem

I use fedora core 4 and xorg-6.8.2. "system-config-display" is incapable of doing anything right. Manually editing my xorg.conf (after 10s of tries- literally) i ended up to the following, which looks right, according to internet sources. However, my left screen doesn't work.
In previous tries the best i could do was my left screen to become the clone of the right.
Both are connected on ATI Radeon 7500. The left is connected on DVI via an adaptor (yes both are analog LCDs). It is an 15'' monitor with 1024x768. The right is an 17'' LCD with 1280x1024.
What's wrong?
Here's xorg.conf:

Code:

# Xorg configuration created by system-config-display and edited by me!



Section "ServerLayout"

        Identifier    "Multihead layout"

        Screen      0  "Screen0"

        Screen      1  "Screen1" RightOf "Screen0"

        InputDevice    "Mouse0" "CorePointer"

        InputDevice    "Keyboard0" "CoreKeyboard"

        Option            "Xinerama" "off"

        Option            "Clone" "off"

EndSection



#Section "ServerLayout"

#        Identifier    "Multihead layout"

#        Screen        "Screen1" LeftOf "Screen0"

#        Screen        "Screen0" 0 0

#        InputDevice    "Keyboard0" "CoreKeyboard"

#        InputDevice    "Mouse0" "CorePointer"

#EndSection



Section "Files"



# RgbPath is the location of the RGB database.  Note, this is the name of the 

# file minus the extension (like ".txt" or ".db").  There is normally

# no need to change the default.

# Multiple FontPath entries are allowed (they are concatenated together)

# By default, Red Hat 6.0 and later now use a font server independent of

# the X server to render fonts.

        RgbPath      "/usr/X11R6/lib/X11/rgb"

        FontPath    "unix/:7100"

EndSection



Section "Module"

        Load  "dbe"

        Load  "extmod"

        Load  "fbdevhw"

        Load  "glx"

        Load  "record"

        Load  "freetype"

        Load  "type1"

        Load  "dri"

EndSection



Section "InputDevice"



# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))

#        Option        "Xleds"                "1 2 3"

# To disable the XKEYBOARD extension, uncomment XkbDisable.

#        Option        "XkbDisable"

# To customise the XKB settings to suit your keyboard, modify the

# lines below (which are the defaults).  For example, for a non-U.S.

# keyboard, you will probably want to use:

#        Option        "XkbModel"        "pc102"

# If you have a US Microsoft Natural keyboard, you can use:

#        Option        "XkbModel"        "microsoft"

#

# Then to change the language, change the Layout setting.

# For example, a german layout can be obtained with:

#        Option        "XkbLayout"        "de"

# or:

#        Option        "XkbLayout"        "de"

#        Option        "XkbVariant"        "nodeadkeys"

#

# If you'd like to switch the positions of your capslock and

# control keys, use:

#        Option        "XkbOptions"        "ctrl:swapcaps"

# Or if you just want both to be control, use:

#        Option        "XkbOptions"        "ctrl:nocaps"

#

        Identifier  "Keyboard0"

        Driver      "kbd"

        Option            "XkbModel" "pc105"

        Option            "XkbLayout" "us"

EndSection



Section "InputDevice"

        Identifier  "Mouse0"

        Driver      "mouse"

        Option            "Protocol" "IMPS/2"

        Option            "Device" "/dev/input/mice"

        Option            "ZAxisMapping" "4 5"

        Option            "Emulate3Buttons" "yes"

EndSection



Section "Monitor"

        Identifier  "Monitor0"

        VendorName  "Monitor Vendor"

        ModelName    "Samsung SyncMaster 172X/177X/CX710X (Analog)"

        HorizSync    30.0 - 81.0

        VertRefresh  56.0 - 75.0

        Option            "dpms"

EndSection



Section "Monitor"

        Identifier  "Monitor1"

        VendorName  "Monitor Vendor"

        ModelName    "LCD Panel 1024x768"

        HorizSync    31.5 - 48.5

        VertRefresh  40.0 - 70.0

        Option            "dpms"

EndSection



Section "Device"

        Identifier  "Videocard0"

        Driver      "radeon"

        VendorName  "Videocard vendor"

        BoardName  "ATI Radeon 7500"

        BusID      "PCI:1:0:0"

EndSection



Section "Device"

        Identifier  "Videocard1"

        Driver      "radeon"

        VendorName  "Videocard Vendor"

        BoardName  "ATI Radeon 7500"

        BusID      "PCI:1:0:0"

EndSection



Section "Screen"

        Identifier "Screen0"

        Device    "Videocard0"

        Monitor    "Monitor0"

        DefaultDepth    24

        SubSection "Display"

                Viewport  0 0

                Depth    16

                Modes    "800x600" "640x480"

        EndSubSection

        SubSection "Display"

                Viewport  0 0

                Depth    24

                Modes    "1280x1024" "1152x864" "1024x768" "800x600" "640x480"

        EndSubSection

EndSection



Section "Screen"

        Identifier "Screen1"

        Device    "Videocard1"

        Monitor    "Monitor1"

        DefaultDepth    24

        SubSection "Display"

                Viewport  0 0

                Depth    24

                Modes    "1024x768" "640x480"

        EndSubSection

        SubSection "Display"

                Viewport  0 0

                Depth    24

                Modes    "1024x768" "800x600"

        EndSubSection

EndSection



Section "DRI"

        Group        0

        Mode        0666

EndSection

change to:

Code:

Section "Device"

        Identifier  "Videocard0"

        Driver      "radeon"

        VendorName  "Videocard vendor"

        BoardName  "ATI Radeon 7500"

        BusID      "PCI:1:0:0"

        Screen 0

EndSection



Section "Device"

        Identifier  "Videocard1"

        Driver      "radeon"

        VendorName  "Videocard Vendor"

        BoardName  "ATI Radeon 7500"

        BusID      "PCI:1:0:0"

        Screen 1

EndSection

you may also want to turn xinerama back on. That allows you to drag a window from one desktop to another.

Pete

I have the following xorg.conf. Everything is OK, except the fact, that the left screen is the central one -the one, that contains the applications, etc- and the right one is the "spare" one. How can i do the opposite? I have done many unsuccessful attempts and it would be better if one could answer me directly. Thanks

Code:

Section "ServerLayout"

        Identifier    "Multihead layout"

        Screen      0  "Screen0"

        Screen      1  "Screen1" RightOf "Screen0"

        InputDevice    "Mouse0" "CorePointer"

        InputDevice    "Keyboard0" "CoreKeyboard"

        Option            "Xinerama" "on"

        Option            "Clone" "off"

EndSection



#Section "ServerLayout"

#        Identifier    "Multihead layout"

#        Screen        "Screen1" RightOf "Screen0"

#        Screen        "Screen0" 0 0

#        InputDevice    "Keyboard0" "CoreKeyboard"

#        InputDevice    "Mouse0" "CorePointer"

#EndSection



Section "Files"



# RgbPath is the location of the RGB database.  Note, this is the name of the 

# file minus the extension (like ".txt" or ".db").  There is normally

# no need to change the default.

# Multiple FontPath entries are allowed (they are concatenated together)

# By default, Red Hat 6.0 and later now use a font server independent of

# the X server to render fonts.

        RgbPath      "/usr/X11R6/lib/X11/rgb"

        FontPath    "unix/:7100"

EndSection



Section "Module"

        Load  "dbe"

        Load  "extmod"

        Load  "fbdevhw"

        Load  "glx"

        Load  "record"

        Load  "freetype"

        Load  "type1"

        Load  "dri"

EndSection



Section "InputDevice"



# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))

#        Option        "Xleds"                "1 2 3"

# To disable the XKEYBOARD extension, uncomment XkbDisable.

#        Option        "XkbDisable"

# To customise the XKB settings to suit your keyboard, modify the

# lines below (which are the defaults).  For example, for a non-U.S.

# keyboard, you will probably want to use:

#        Option        "XkbModel"        "pc102"

# If you have a US Microsoft Natural keyboard, you can use:

#        Option        "XkbModel"        "microsoft"

#

# Then to change the language, change the Layout setting.

# For example, a german layout can be obtained with:

#        Option        "XkbLayout"        "de"

# or:

#        Option        "XkbLayout"        "de"

#        Option        "XkbVariant"        "nodeadkeys"

#

# If you'd like to switch the positions of your capslock and

# control keys, use:

#        Option        "XkbOptions"        "ctrl:swapcaps"

# Or if you just want both to be control, use:

#        Option        "XkbOptions"        "ctrl:nocaps"

#

        Identifier  "Keyboard0"

        Driver      "kbd"

        Option            "XkbModel" "pc105"

        Option            "XkbLayout" "us"

EndSection



Section "InputDevice"

        Identifier  "Mouse0"

        Driver      "mouse"

        Option            "Protocol" "IMPS/2"

        Option            "Device" "/dev/input/mice"

        Option            "ZAxisMapping" "4 5"

        Option            "Emulate3Buttons" "yes"

EndSection



Section "Monitor"

        Identifier  "Monitor0"

        VendorName  "Monitor Vendor"

        ModelName    "Samsung SyncMaster 172X/177X/CX710X (Analog)"

        HorizSync    30.0 - 81.0

        VertRefresh  56.0 - 75.0

        Option            "dpms"

EndSection



Section "Monitor"

        Identifier  "Monitor1"

        VendorName  "Monitor Vendor"

        ModelName    "LCD Panel 1024x768

Change

Code:

Section "ServerLayout"

        Identifier    "Multihead layout"

        Screen      0  "Screen0"

        Screen      1  "Screen1" RightOf "Screen0"

        InputDevice    "Mouse0" "CorePointer"

        InputDevice    "Keyboard0" "CoreKeyboard"

        Option            "Xinerama" "on"

        Option            "Clone" "off"

EndSection

Code:

Section "ServerLayout"

        Identifier    "Multihead layout"

        Screen      0  "Screen0"

        Screen      1  "Screen1" LeftOf "Screen0"

        InputDevice    "Mouse0" "CorePointer"

        InputDevice    "Keyboard0" "CoreKeyboard"

        Option            "Xinerama" "on"

        Option            "Clone" "off"

EndSection

or this

Code:

Section "ServerLayout"

        Identifier    "Multihead layout"

        Screen      0  "Screen1"

        Screen      1  "Screen0" RightOf "Screen1"

        InputDevice    "Mouse0" "CorePointer"

        InputDevice    "Keyboard0" "CoreKeyboard"

        Option            "Xinerama" "on"

        Option            "Clone" "off"

EndSection