File 20-displaylink.conf of Package displaylink

Section "Device"
    Identifier "intel"
    Driver "modesetting"
    Option "kmsdev" "/dev/dri/card0"
    Option "PageFlip" "off"
    Option "SWCursor" "on"
    Option "ShadowFB" "true"
EndSection

Section "Device"
    Identifier "USB3"
    BusID "USB"
    Driver "modesetting"
    Option "kmsdev" "/dev/dri/card1"
    Option "PageFlip" "off"
    Option "SWCursor" "on"
    Option "ShadowFB" "true"
EndSection

Section "Device"
    Identifier "USB3"
    BusID "USB"
    Driver "modesetting"
    Option "kmsdev" "/dev/dri/card2"
    Option "PageFlip" "off"
    Option "SWCursor" "on"
    Option "ShadowFB" "true"
EndSection

Section "Device"
    Identifier "USB3"
    BusID "USB"
    Driver "modesetting"
    Option "kmsdev" "/dev/dri/card3"
    Option "PageFlip" "off"
    Option "SWCursor" "on"
    Option "ShadowFB" "true"
EndSection