I am using Ubuntu 13.04 and it works when I use an LCD television. My graphics card is a GeForce 650 Ti and my monitor is a HP w1907v.
The graphics card works perfectly, the monitor works, the VGA cable works. It's Ubuntu. I have tried changing the screen resolutions but it just stays in sleep mode. (I am currectly using my LCD to work as a second screen so I can see what I am doing). I have tried changing stuff like resolutions on my monitor but I can't even get onto a menu as it just goes into sleep mode instantly.