I have a desktop without graphics card and I just bought a VGA 2 port 200 MHz VGA splitter. I have a LG monitor as primary and viewsonic VA1912wb monitor as seconday.
when using the VGA splitter, the second screen is mirroring the first one, instead of extending. In settings > Display > Multiple Display > Detect button throws the error : Didn't detect another display.
31 Answer
A VGA splitter will not, on its own, enable your operating system to use two monitors independently.
You will need a dual-output graphics card for that.
It can also be done by using certain software, though this may offer more limited support.
There's more info in this article.
