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I have laptop dell lattitude e6510. It has nvidia 3100m display chip. System is Windows 7 x64 and I've installed the newest drivers from dell.

I can't run required configuration: work on 2 external monitors. One is DSub connected to laptop and the other is DVI connected through DisplyPort->DVI adapter. When I connect monitors like above I have desktop visible on laptop monitor and on DSub monitor. I can't change it to show on both external monitors. When I enter into "Screen resolutions" window I can't detect there the monitor connected through DP->DVI adapter. Adapter itself is running well as I tried to connect it to another dell laptop with different graphics card the monitor showed at once after connecting. This dell is precision m4500 with nvidia quadro fx 1800m.

What should I setup somewhere?

  • what's the problem? Expand on what's happening, because At this point possibilities to numerous to list. – AcePL Mar 30 '15 at 8:11
  • I extended problem description – koral Mar 30 '15 at 8:34
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Based on your description you have those possible problems:

  1. Bad connection to Monitor. Check all cables are connected properly. Probability: low
  2. External monitor is not recognized as it's not set to DVI source. Turn it on and force DVI as source in monitor menu, if this is a model with both VGA/DVI input (most have auto detect, but this may not work well). Probability: low
  3. You need to install Dell Nvidia drivers. Unfortunately a lot of problems like this are caused by Nvidia drivers. Download drivers for your laptop from Dell Website, uninstall current ones, install Dell drivers. Probability: high.
  4. You need to connect the monitor while logged onto Windows. Additionally, try to connect it as only external display (that is: disconnect VGA one first). probability: medium
  5. Your DP>DVI adapter is Dell-incompatible. More often than not Dell laptops work well with Genuine Dell adapters only. Probability: very high.
  • 1. The same DVI monitor using the same cable is working on another PC. 2. This is the point I don't understand. What should I set to HDMI? I don't use HDMI at all. 3. I've already installed nvidia drivers downloaded from dell site 4. I conntected monitor while logged into Windows and this was the first monitor connected. 5. I checked adapter on another DELL laptop (different graphics card) and it works – koral Mar 30 '15 at 9:03
  • Oh, sorry. Substitute DVI for HDMI in my reply. Correcting now. As for drivers - did you uninstall and remove old ones first? If not, do that. Also - try to install first version of the Dell drivers first, not the last one. I know - Dell is a bitch to set up sometimes. What other Dell Laptop is this? – AcePL Mar 30 '15 at 9:07
  • I've installed this driver dell.com/support/home/us/en/19/Drivers/… How can I get older one? – koral Mar 30 '15 at 9:55
  • added info about the second dell where all worked ok – koral Mar 30 '15 at 11:21
  • Look here. I would recommend going for one of the "Driver Packs", as they are made available "as is" and aren't updated. downloads.dell.com/published/pages/latitude-e6510.html – AcePL Mar 30 '15 at 11:43
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It occurred that the laptop was damaged. Other one (same model) was working well.

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I tested that you can extend the desktop of a Dell Latitude E6510 on two external monitors if using a DELL PR02X docking station (and most probably with a DELL PR03X docking station as well). The PR02X is the wide model and the PR03X is the narrow one. The tests were performed with the "default" Intel GMA graphics, but it should also work when the laptop comes with the NVIDIA graphic chip.

Maybe having the NVIDIA 3100M you can connect two external monitors without using a docking station, but I'm not sure however. A computer having several graphical ports doesn't mean that you can use them at the same time.

As the user AcePL mentioned, you must install the NVIDIA drivers. I would suggest downloading them from Dell's website if they're available ; else, visit Nvidia's website.

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