Hello and thank you for posting!
I am sorry things are not working as expected while using your Plugable docking station at home and I would be happy to help.
Thank you as well for the detail you provided and the troubleshooting that you have already performed that is much appreciated.
While you do not mention it specifically, my impression based on your description is that you are using our Thunderbolt 3 Docking Station with Charging known as the TBT3-UDV --> https://plugable.com/products/tbt3-udv/
You have a video cable with a DisplayPort connector on one end and a DVI connector on the opposite end. You have the DisplayPort end of the cable connected to the TBT3-UDV’s built-in DisplayPort video output, and the DVI end of the cable connected to your Dell E2211h displays DVI video input.
Is my understanding correct? If not please correct me, because if you are using a different docking station model then our course of action will differ from what I describe below.
Assuming for the moment that my understanding is correct, in brief the problem is that the type of video cable you are using is incompatible with the TBT3-UDV dock. You must replace the cable with a different type in order for the Dell display to work properly.
To expand further, the cable you have with a DP connector on one end and a DVI connector on the other end is a ‘passive’ cable. A passive video cable is not compatible with the TBT3-UDV, and this is why the display is not working.
If the TBT3-UDV’s DisplayPort video output needs to be converted to any other video standard, then an ‘active’ video cable is required. It is for this reason that we include in the box with the dock an ‘Active’ DisplayPort to HDMI adapter.
In order to connect your Dell display to the dock, I would recommend using the included Active DisplayPort to HDMI adapter in conjunction with an inexpensive HDMI to DVI video cable (purchased separately) such as this example --> http://amazon.com/dp/B014I8UQJY to connect the display. To put that another way, the display would be connected like so:
TBT3-UDV dock built-in DisplayPort video output --> Active DisplayPort to HDMI adapter (included in box with dock) --> HDMI to DVI video cable (a cable with a HDMI connector on one end and DVI connector on the other, purchase separately) --> DVI video input of Dell E2211h display
Please let us know if that information helps, and thank you for giving us the chance to assist!