Fedora 25 now detects and automatically configures the DisplayLink device on my computer at boot time. Right on the LiveDVD it will light up the monitor and then you will have to use the Displays control panel once you logon to arrange your monitors. I was pleasantly surprised because I have not been able to use this device on any Linux computer without severe problems with stability and an annoying, flickering mouse cursor.

At any rate, you then will have to copy your working monitors.xml to /etc/skel/.configure and also to /var/lib/gdm/.config/ in order to ensure consistency across the system because Xorg and Wayland still don't know how to arrange multiple monitors' ports correctly. Every time I end up with screen 3 as primary, with the DisplayLink device being set up as screen 2 (off to the right of screen 1) and the other identical monitor to the right of screen 3 as screen 1. They are always scrambled until I manually set the arrangement and save the configuration.

Unfortuately, if you enable acceleration options or TearFree on a Radeon card, it will then render the DisplayLink device inoperable again until you remove the xorg.conf file that configures those options for the Radeon card. Tried several configurations and nothing has so far worked. So, I just went back to the default auto-configuration. I don't do a whole lot on the Linux side these days any more so I guess I will worry about acceleration later.