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Journeyman III

iDisplayLogicalIndex is -1 in old ATI HD4xxx graphics card

I'd like to get "iDisplayLogicalIndex" for accessing "ADL_Display_DDCBlockAccess_Get" in old ATI graphics card (HD4890).

I use "ADL_Display_DisplayInfo_Get" to get ADLDisplayInfo and iDisplayLogicalIndex.

But it got -1 for the active connector. In new AMD graphics card, it always starts from 0.

Does it mean I can't access DDC block in old ATI graphics card? Any way to do it?


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