Some applications may not support the primary option yet, so I do not think that this a bug in xfce4-settings which just enables it (equally to xrandr --output <display> --primary).
https://bugzilla.xfce.org/show_bug.cgi?id=8328
If possible, please test with Xubuntu 18.10 (dev release).
Some applications may not support the primary option yet, so I do not think that this a bug in xfce4-settings which just enables it (equally to xrandr --output <display> --primary).
https:/ /bugzilla. xfce.org/ show_bug. cgi?id= 8328
If possible, please test with Xubuntu 18.10 (dev release).