Rpi 4 and two monitors

[NathTheDude]

Hey @sdetweil , I started with stopping MM (pm2 stop all). This then allowed me to use VNC to change the screen settings, as in just rotate the screen’s display.

The screens are showing as two seperate desktops and from VNC the mouse smoothly goes from one display to the other.

When MM is started this completly fills the first screen and a raspbian windows desktop is seen on the 2nd screen.

[sdetweil]

@NathTheDude try the raspian, preferences, appracne settings, desktop stretch across

[NathTheDude]

Thanks @sdetweil , I have just played with those settings again. These seem to only effect the desktop and the desktop background and not the MM site. Always appears on the first screen.

[sdetweil]

@NathTheDude but is the desktop all the way across as a single desktop, or two separate instances?

[NathTheDude]

@sdetweil , it is seen as two separate monitors. There is not a setting to scretch one screen to the other with the settings. The closest is ‘Strectch to cover screen’ but that does not seem to help.

[bhepler]

@sdetweil - I don’t know if that capability is in the Raspi display drivers. It’s always going to see the two monitors as two separate devices with unique desktops. If you click on the Identify button, it should show you a different number on each monitor.

The only thing I can think of that would treat two monitors as a single continuous desktop is the AMD Eyefinity tech.

[NathTheDude]

Thanks @sdetweil and @bhepler , could you point me in the direction of how I would display a seperate instance of MM each monitor? I know this would mean I would need to update/maintain two different MM’s but maybe that is a better option if I want to add various modules?

[sdetweil]

@bhepler said in Rpi 4 and two monitors:

I don’t know if that capability is in the Raspi display drivers. It’s always going to see the two monitors as two separate devices with unique desktops. If you click on the Identify button, it should show you a different number on each monitor.

well, that is stupid sh… , in this day and age you should be able to config the thing like u want…

I booted ubuntu on my desktop with has two displays and it made one big desktop by default…
can’t understand why raspi should be so dumb

[NathTheDude]

does this help

---

pi@MagicMirrors:~ $ tvservice --list
2 attached device(s), display ID’s are :
Display Number 2, type HDMI 0
Display Number 7, type HDMI 1
pi@MagicMirrors:~ $

[sdetweil]

@NathTheDude MagicMirror startup in the run-start.sh file sets DISPLAY=:0 for the primary display
I would guess that the second display is :1

so, do
export DISPLAY=:1
then npm start

see if it comes up on the second display