Windows XP + No output on second screen

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This applies to Windows XP and above and MXWendler version 4.0 and above with NVidia graphics


The MXW UI runs, and you see content updating in the output on the first screen, but not on the second (output) screen.


You have an NVidia graphics board.


1. Open NVidia system settings.
2. Under 'Multi-GPU Acceleration' enable 'Compatibility Mode'.


If you select performance mode, only the first screen receives OpenGL updates.
This is performance-wise the best solution, but you have to split the screen eg. using a Matrox Triplehead or using an NVidia horizontal span.