I’ve been digging for a solution to a similar problem. I actually have 4 of these monitors (feel free to be jealous), and am using/want to use them with my Dell Precision 7720 laptop. The problem is that the laptop’s internal video will only support up to three external monitors (It’s an internal video card issue, not just a port issue, as I have a Dell dock with two HDMI connectors, and the laptop itself has both a mini-displaylink and an HDMI connector, but it just won’t support more than three external monitors, no matter what (sigh). I even tried adding a Dell USB-C dock/port expander, in addition to the existing dock.)
In any case, I set out to solve this problem by obtaining an external USB->HDMI video solution. Subsequently, I’ve tried two different ones, and neither supports the 3840x1080 resolution of the monitor. The best I’ve been able to do to-date is a USB32HD2 from StarTech, which forces the monitor to display at a ‘compressed’ 3840x2160 (on the 4K port). This is ‘working’ but I’d really prefer to have all four external monitors at the same resolution.
Does this dock categorically support 3840x1080 resolution? And does it have actual video hardware, like the other various USB->HDMI converters, or is it passing through traffic to the laptop’s internal video card, like the Dell dock I’m using?