In addition to the new WD19 docks I also bought a Dell DA310 portable USB-C dock. The hardware I got from my employer is a Dell Latitude 7280 and a WD15 dock. The monitors are working nicely with 1600x1200 resolution for many years now using my old hardware (see details below) and when checking the Graphics Control Center the EDID of the monitor is correctly read (1600x1200 is listed as supported resolution).
Some others where related to issues with 4K monitors, wrongly selected refresh rate or wrong cabling (not using DualLink cables for higher resolutions, etc.). For some there was no response or solution at all. I searched the Internet for similar reports. For the sake of simplicity I did all tests with just one monitor connected. I have three of these monitors, but even when only one of them is connected to the dock it does not work as expected. However, I'm only able to select 1280x1024 as highest resolution in Windows, 1280x960 is offered as preferred solution (I guess due to the 4:3 aspect ratio). These are NEC MultiSync LCD 2180UX with a native resolution of 1600x1200 and DVI input. I want to connect my existing monitors to the WD19 dock.
The described problem occurs with both laptops and both docks in the same way. It's almost the same hardware except for the connection of the dock (Thunderbolt vs. In parallel my father bought a Latitude 7520 with a WD19S dock. My new hardware is a Dell Latitude 7420 laptop with an Intel 11th Gen CPU and Iris Xe graphics chip + a Dell WD19TBS Thunderbolt dock. Of course more details are required to be able to assess the situation, so here we go: If this is really a software bug, how to get support? If it's not a bug, what am I doing wrong? I would be really grateful for any kind of support in here! I'm really looking forward to finally use the hardware I bought about 2 months ago with its full potential. Based on the results my current assumption is that this seems to be an issue of the Intel Iris Xe graphics driver for Windows 10 or an issue with the drivers required by the USB-C / Thunderbolt ports. In the past weeks I did lots of tests, both on hardware and on software side. Although my monitor has a native resolution of 1600x1200 I'm unable to select anything higher than 1280x1024. I recently bought some new hardware, but I'm unable to get it working in the intended way.
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