I have the same issue. I'm running 13.04 on a MacBookPro (9,1). I connect to external displays using mini DisplayPort adapters. mini DisplayPort to DVI works fine. However, when using mini DisplayPort to VGA, the external display is not detected.
I have the same issue. I'm running 13.04 on a MacBookPro (9,1). I connect to external displays using mini DisplayPort adapters. mini DisplayPort to DVI works fine. However, when using mini DisplayPort to VGA, the external display is not detected.