On Mon, 2 Mar 2020 at 14:55, Michael J. Baars <mjbaars1977.fedora-users@cyberfiber.eu> wrote:
Hi,

I just bought myself a brand new 27" monitor, that came with a standard
VGA cable and no HDMI cable. Apparently VGA is still considered the
standard by Philips. I would like this to be my new primary display.

I also have a somewhat older Samsung 24" monitor, that is connected via
HDMI to the HDMI port of my computer. I would like this to be my
secondary display.

Let boot things up...

The grub boot menu appears on the secondary screen. Apparently the HDMI
port is considered the primary port by the computer manufacturer.
There's no way to change this in the BIOS.

So I thought, let's make the 24" the primary and the 27" the secondary
display. I can always buy an extra 5m VGA cable to replace my new 5m
HDMI cable.

Let boot things up...

The grub boot menu appears on the primary screen. So far so good.
Waiting for the login prompt, and yes, there it is...

on the secondary screen :)

And yes, I've double checked the settings under Devices->Displays and
made sure that the Samsung 24" is the Primary Display.

Any thoughts?

Regards,
Mischa.

if run xrandr in a terminal, does it tell you which one is primary?
Normally on the login screen, one would expect it to appear on the primary first, but it should follow the mouse . . . (I'm not 100% sure gdm does that however)