I am trying to setup my Latitude E6520 with 3 monitors, 2 External and laptop display. THe setup should be as follows:
Primary – Laptop (1920×1080) – Embedded
Secondary – Acer X233H (1920×1080) – HDMI
Tertiary – Acer X183 (1366×768) – VGA
I currently have the externals connected, and I have the Laptop Display working with the X233H, running at the proper resolution…
The problem comes when I plug in the third monitor… I go into my display resolution properties and what happes is strange…
I can see all 3 displays, however, after a few seconds, it disappears off the list… and then several seconds later, it reappears..
I am able to use any 2 displays.. however with all 3 connected, it continually disconnects and reconnects..
My display card is an NVidia NVS4200M, and all drivers are up-to-date from NVidia.
I am running Windows8 (Up to date) and I have Optimus turned off (As Windows8 does not support my dual graphics cards).
Any and all help as to how I can get all 3 displays working correctly is greatly appreciated.
Response to Ariane
I am typing this here because my response would be too long for a comment, and it will add relevant information to my original post:
With all 3 plugged in, I can at any one point get 2 monitors to work, so I am expecting that what you said, in the fact that they share the same output if the problem..
I have tried replacing all of the cables, and still no difference. Does the same things.
I have tried plugging things in in all different orders, rebooting the computer and everything..
In regards to the dual video cards, they are not really 'cards' as one is the Intel Graphics build into the i Processors, and the other is a dedicated, but integrated, processor built into the laptop motherboard, it can not be removed.
In Windows 7, with the dual systems, I was given the option when right click on any .exe to launch it with either the NVidia graphics processor, or the Intel processor. As of right now I have the Intel Processor turned off, however all display ports on the system still work, it just must only support a maximum number of displays.
I will continue to look into this problem as I would love a solution ,but for now I am using an old USB->VGA adapter that I had laying around to power the Triary screen which I will not use for much more then my music application anyway… however it is sill a bit laggy for my taste, and I hope to find an actual solution ^.^
Best Answer
With windows 7, triple monitors did not work for me unless i had both the nvidia nvs4200 driver and the intel hd driver installed. Once i installed both of those, i was then able to launch the nvidia control panel and enable multiple monitors. I dont have my laptop in front of me (left it at the office), but i think the rest was configured through windows screen resolution.
This has been pretty rock solid for me ever since, lots of docking and ejecting from dock through the week (3 to 4 times a day).
I am using the laptop screen and 2 monitors connected through DVI on the pro docking station. You can pick up the docking station at ebay for pretty cheap, you will need a 90 watt power adapter if its not inclueded. ie.
http://www.ebay.com/itm/Dell-Docking-Station-E-Port-Plus-Latitude-E6400-E6420-E6500-E6520-E6410-/261121566456?pt=Laptop_Docking_Stations&hash=item3ccc0ee6f8 and http://www.ebay.com/itm/Genuine-Dell-90W-90-Watt-AC-Adapter-Power-Supply-PA-10-/300845256276?pt=Laptop_Adapters_Chargers&hash=item460bc64e54 These are not my ebay postings and I am not recommending either of these sellers, im only using them as a reference for you.
I have not tried using the HDMI and VGA ports on the laptop it self, no HDMI monitors at work for testing.