I have a HP 2013 Ultra Slim Docking Station with Elitebook pro 840G1 but I can't display op either DP ports from the docking station when I connect my Dell 2516Q 4k monitor. When I plugin the DP cable directly on the laptop it works like a charm.
Seem that the dockingstation doesn't support this monitor. Is there a firmware or driver I need to install to get this working?
I got the same issue with the BenQ BL3201PT monitor. Works when connected to the computer, but if I connect it through the docking station, I get no signal. Works though if I lower the resolution to 1920x1080@60Hz.
I had this same problem but was able to solve it. I switched my monitor from DisplayPort version 1.1 to 1.2. My monitor reset itself and when it came back up the dock/computer recognized it as 4k automatically. Every monitor will have a different way to set this so check your manual.
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