I have a Dell Precision 7510 with a AMD Radeon M375
When i connect to my monitor and want to use it as primary the screens go black.
It is connected via a Levono Thinkpad USB 3.0 Ultra dock.
If i disable the AMD driver in the device manager the second screen works. But as soon as i enable the driver the monitor disconnects.
When i look into the Customize display in win 10 it looks like this
And in Device Manager it looks like this
I use the latest driver from AMD 22.19.676.0
And Display link 8.3.1905.0
You have the wrong driver. Please download and install the driver from DELL website