Just got my UD-3900, plugged everything in, and its completely unusable. I instantly noticed lag with the mouse and pretty much everything else. I am only using it for a second monitor for my laptop (which has usb 3.0) but the performance isn’t there. The laptop is msi gx63vr.
Also, I already tried unplugging the power cord, uninstalling the DisplayLink in control panel and than DisplayLink cleaner tool, reboot, and installing 9.0 M1 DisplayLink software, and plugging everything back, that didn’t work.