External Monitor - MacBook - Intel GMA 945

Hey guys,
I've run into a problem running Windows Vista Ultimate on my 1st gen Macbook with Intel GMA 945 chipset. I have upgraded to Leopard.
Running a Mini-DVI to DVI converter and connecting to my LCD does not work any longer.
* I have run the external monitor on XP and Vista on previous versions of Bootcamp.
* The external monitor works fine on the Leopard side.
* When I plug in the cable my MacBook screen "flickers" - as if the graphics card detects the external monitor.
* When plugged in, the inbuilt Intel GMA 945 graphics driver does not display the option to "Output to" - something it did on previous versions of bootcamp.
* The inbuilt Vista multiple monitor detect thingo no longer pops up when I connect my monitor.
* My LCD monitor says that there is "No sync detected" when I plug in the cable.

Sorry for reviving this thread from the dead, but I found a workaround and wanted to share it:
As mentioned on https://bugs.launchpad.net/ubuntu/+sour … bug/796030 this is a known(?) bug with Kernel versions newer than 2.6.34.
So after downgrading to this version I was able to use the full resolution of the screen, but with a ~ 200pixel wide stripe missing between the monitors (External left of internal => virtual Screen of 3200*1200) and a equally sized stripe of the most left screen on the most right side. This stripe was only missing for the screen, but not for the mousecursor => If I wanted to press a button I had to press it ~200pixel right of it
(But I was able to use Composite Effects in Compiz)
This was resolved by disabling Composite in xorg.conf
not the full xorg.conf
Section "Extensions"
Option "Composite" "Disable"
EndSection

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