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1-2: logs needed. D3D and DirectDraw? Usually it is VM problem, they really seem to hate dynamic surfaces/textures (whole big surface is updated 50fps using the CPU).
3: probably a bug.
4: it is normal, autoscale only calculates (and sometimes guesses) where display starts and ends using custom chipset register values. It does not know (and can't know) nothing about dragging, scrolling etc..
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