...found a solution this weekend: in order to support 2 screen [NAME] resolution I had to set the USB setting from the screen, which acts as a docking, from 3.2 to 2.0.
Hello all,   I have a Dell Precision 5520 i7-6820HQ, which I would like to connect to 2 Philips 276B1 QHD monitors (extended desktop setting, one monitor as USB-C docking). My configuration at the moment: Dell Thunderbolt 3 USB-C -> Startech 20Gbps Thunderbolt cable -> USB-C 3.2 of first Philips 276B1 -> via display port out to second Philips 276B1 display port in. The first monitor is set to QHD resolution, however the second is limited to 1920x1080. The monitors itself support USB-C 3.2, DisplayPort 1.4 etc. Already tried several things (different cables, setup etc.), but so far without success. What is causing the limitation, or is it not possible wit a Dell Precision 5520? Thanks in advance.
Dell Precision 5520 with two QHD monitors