I'm trying to connect two monitors to my Optiplex 390 small form factor PC.  I want to use the HDMI port and VGA port to do this.  So monitor 1 would be connected to the HDMI port (via HDMI native or HDMI to DVI cable) and monitor 2 would be connected to the VGA.  When the HDMI port is connected to the display, monitor 2 (VGA) turns off.  When I try to extend the displays to turn the VGA monitor back on it flickers and goes back to the monitor 2 (HDMI) only.  Both the BIOS and the Video driver are the latest from support.dell.com.  I was hoping to avoid having to purchase an addin video card.  Is this even possible to do dual video with the embedded video card?