I have a Dell Precision m6700, and prior to that I had a Dell Latitude e6520 -- the following configuration worked for both of them.

Here's a pic of my docking station:

enter image description here

I use my laptop's screen (open on the dock), 2 monitors plugged into the 2 DVI ports, and 1 VGA port for a 3rd monitor. I really like this setup. It's like having 4 screens.

Recently my Precision was re-imaged, and now I can't get the VGA port to do anything for me. The DVI monitors work fine. Pulling DVI connections doesn't fix VGA, nor does having VGA alone permit it to be detected.

The video adapter is NVIDIA Quadro K3000M. The VGA monitor is just black, I can press the source button on it and it will cycle through digital/analog to no result. The cables are very snug, and nothing physically has changed in my configuration -- just the Windows re-image.

I have tried using the latest NVidia drivers, the older drivers from Dell's support site, and even beta NVidia drivers to no avail. Does anyone have any other ideas?

  • Here's one: have you checked the VGA monitor with another computer? Also, quite often I've seen this happening on freshly booted PCs - one needs to log in first and then start connecting devices - but that's for just first time only, of course. DOn't know why. ANd you're sure it was just "re-imaging" that was done? FInally: do you see the VGA screen recognized in WIndows when adjusting display resolution? – AcePL Feb 15 '17 at 16:51

I was able to resolve, and it's a bit of a facepalm. I needed to install the Intel graphics driver alongside the NVidia driver, and doing this immediately turned on the VGA screen.

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