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?