NUC8i7beh and TB16 Thunderbot expansion dual monitor issue

[JTeag1]

Hi, I have a NUC8i7beh. with a Dell TB16 Thunderbolt dock and dual monitors on the Displayport and HDMI ports.  

If both monitors are plugged into the TB16, only the displayport works. To get both monitors working, I have to use the HDMI on the back of the NUC, so when I plug my laptop into the expansion box, I have to take the HDMI out of the NUC. 

Everything else works through the expansion box - keyboard, mouse, external storage.

Any ideas?

[David_V_Intel]

Hello JTeag1, Thank you for posting on the Intel ® communities. I would like to start by saying that Intel* does not recommend the use of any kind of adapters/dock. This is because we cannot test all of them, so we cannot guarantee that these are going to work. We can recommend you to update your graphics driver, that in some cases will fix the problem, you can find the latest graphics driver for your Intel ® NUC in the link below: https://downloadcenter.intel.com/download/28437/Intel-HD-Graphics-Driver-for-Windows-10-for-Intel-NU... Regards, David V Intel Customer Support Technician Under Contract to Intel Corporation

[David_V_Intel]

Hello JTeag1, Did you try updating the graphics driver? Let me know please. Regards, David V Intel Customer Support Technician Under Contract to Intel Corporation