[square_eyes]

Originally Posted by rboerner

According to page 4 of the manual for the Dell D6000 docking station --> https://dl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_pc_tablet/dell-universal-dock-d6000_user's-guide_en-us.pdf the maximum supported resolution is 4K at 60Hz.

While Dell doesn't specify as to whether 4K means 3840x2160 or 4096x2160, either resolution is lower than the maximum resolution of your Lenovo display (5120x2160).

This means the docking station does not support your display's maximum resolution.

I might be hijacking this thread in hindsight. I was referring to DL drivers and Mac OS. As it happens I have the StarTech DK30A2DH. Which should be able to render 2X 4K. Whether that translated to capability out a single DP to WUHD I don't know.

However, if I select from the available alternatives "Show all resolutions" 2048 x 1080 (HiDPI) I get a good 4K resolution/ratio taking up the whole WUHD screen, but poor scaling - items are huge. So it seems more like the OS not understanding the scale.