twinview and other related questions

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Bonjour,

I run FC4 on my laptop with a nvidia graphic card. I use nvidia driver from nvidia, but I think that the problem will be the same if I used livna nvidia driver.
nvidia card is GeForce Go 6600

I want to connect a beamer and get display on both LCD panel and "CRT" (beamer).
My LCD panel has 1280x800 resolution (15"4)
The beamer has 1024x768 resolution

First solution: use of TwinView; here is my xorg.conf file:

<snip>  system configation
</snip>

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 1280x800"
        HorizSync    31.5 - 90.0
        VertRefresh  60.0 - 60.0
        Option       "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "nvidia"
        VendorName  "Videocard vendor"
        BoardName   "NVIDIA GeForce Go 6600"
        Option      "TwinView" "on"
Option "MetaModes" "CRT-0: 1024x768 @1280x800, DFP-0: 1280x800"
#       Option      "NoTwinViewXineramaInfo" "off"
        Option      "HorizSync"   "CRT-0: 50-100;  DFP-0: 31.5-90"
        Option      "VertRefresh" "CRT-0: 60-120;  DFP-0: 60"
        Option      "TwinViewOrientation" "Clone"
#       Option      "UseEDIDDpi" "FALSE"
        Option      "DPI" "90 x 95"
EndSection

<snip>

The last "option" has no effect; it is an attemp, without success, to solve my problem: I want to have a full display on each "screen"; with this configuration, display is correct on LCD panel but on projector display parts are missing which I can display using the mouse.
Question: is it possible to have the same screen display, on LCD *and*
on bearmer screen?

Second solution: use of multiple screens; here are the parts I changed in xorg.conf:
Section "ServerLayout"
        Identifier     "Multihead layout"
        Screen      0  "Screen0" Above "Screen1"
        Screen      1  "Screen1"
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
        InputDevice    "Synaptics" "AlwaysCore"
        Option      "Xinerama" "off"
        Option      "Clone" "on"
EndSection

<snip>


Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor 1024x768"
        HorizSync    31.5 - 90.0
        VertRefresh  60.0 - 60.0
        Option      "dpms"
EndSection

Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 1280x800"
        HorizSync    31.5 - 90
        VertRefresh  60 - 60
        Option      "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "nvidia"
        VendorName  "Videocard vendor"
        BoardName   "NVIDIA GeForce Go 6600"
        BusID       "PCI:1:0:0"
        Screen      0
EndSection

Section "Device"
        Identifier  "Videocard1"
        Driver      "nvidia"
        VendorName  "Videocard Vendor"
        BoardName   "NVIDIA GeForce Go 6600"
        BusID       "PCI:1:0:0"
        Screen      1
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    "1024x768" "800x600" "640x480"
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "Videocard1"
        Monitor    "Monitor1"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1280x800" "1024x768"
        EndSubSection
EndSection

</end>


With this configuration, I have two *different* screen: the Beamer is above the the LCD panel (the mouse goes without any problem from one to the other), each resolution is correct: I have full screen display on both (Beamer and LCD) but the display is not the same: I can open a graphical application on beamer which is not seen on LCD and "vice-versa"....
I don't understand what is the meaning of the "Clone" option in
Section "ServerLayout"....
Is there a way to have exactly the same screen displayed, with different
resolutions, in order to have the same display on both display screens:
beamer and LCD?
I hope to be clear enough....

Thanks for help.
--
François Patte
UFR de mathématiques et informatique
Université René Descartes
http://www.math-info.univ-paris5.fr/~patte


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