|To answer the questions, we set the resolutions to 1024x768, the lowest that both of them had that matched. No difference in the problems.|
The splitter we are using is specifically labelled, "Dell DVI to DVI/SVGA Splitter Cable WU329." I like this question because it brought up the same one I had. In another room here we have a projector with a a simple VGA splitter (since that computer has a VGA display port on the computer). That one does not even recognize that there is a projector attached to it. Yet, this DVI/SVGA one sees both of them.
And, no, there is only the single DVI display port on the back of the Dell Optiplex745 desktop.