This PC is Ubuntu Studio with Xfce, used as a gaming emulator and home cinema.
Primary display: Dell 2009W (1680x1050) - monitor Secondary display: Panasonic PTAT6000 (1920x1080) - projector GPU: GeForce GTX 1060 6GB Driver: nvidia-driver-510 Display manager: lightdm
I have several display-related problems to do with different games and emulators messing up the screen resolution, the defaults not being remembered, and the options I need on the NVIDIA control panel going off the sides of the screen at very low resolutions.
But this question is about when the PC is switched on and the login prompt pops up for Xfce. It's always on the projector, which is never on when the system boots - it's only switched on to watch a film.
How can I make the login prompt always appear on the Dell-2009W regardless of its logical display number?
I guess this might be a similar problem to:-
Force gdm login screen to the primary monitor
but where it says gdm that's Gnome Display Manager so the steps for Xfce might be different.
