Got a reply, this is my attempt for translating it (oh, the irony of them linking a fbdev support page):
"I checked status with my supervisor but unfortunately Displaylinks says that Linux on have "experimental support" (
https://wiki.archlinux.org/index.php/DisplayLink) and thus aren't supported under linux by Dell. This means that there isn't anything I can do about the issue, but you can contact sales at 67 11 68 00 if you'd like to return the unit."
Sjekket status med min supervisor men dessvärre så seier DisplayLink at Linux har kun "expermintal support" (
https://wiki.archlinux.org/index.php/DisplayLink) og er ikke stöttet under Linux av Dell. Dette mener at det finns ikke noen som jeg kan gjöre åt saken men du kan kontakte Salg på 67 11 68 00 om du vil hevde kjöpet.
Mvh,
Name
Support Technician
DELL | ProSupport Norway