Multiple external monitors displayed incorrectly in Preferences > Sketches

[SableRaf]

Most appropriate sub-area of Processing 4?

Other (specify if possible)

Processing version

4.5.2

Operating system

verified on macOS 26.5.1 Tahoe

Bug description

When more than one external monitor is connected, the monitor layout shown in Preferences → Sketches → Run sketches on display does not match the actual display configuration.

Issues observed in the screenshot below (by @MickaelLafontaine):

• Seven displays are connected, but the UI shows only five. (using a monitor controller to connect to 4 displays from one input, appearing as a single display is expected)
• Two displays are shown as selected target display. Only one target display should be possible at a time.
• Multiple displays share the same labels (1 or 2) instead of each having a unique number (1 to 5).

Steps to reproduce this

1. Connect multiple external monitors.
2. Open Preferences → Sketches.
3. Look at the Run sketches on display monitor selector.

snippet

n/a

Additional context

Initially mentioned here: #1426 (comment)

Would you like to work on the issue?

No, I’m just reporting the issue

[MickaelLafontaine]

One comment about the 3 x 4K displays. This is 3 datapaths that takes as input one RG45 and as output 4 hdmi with full hd resolution each.
Here is the reference : https://www.datapath.fr/produits-datapath/controleurs-de-murs-video/datapath-fx4/

[SableRaf]

One comment about the 3 x 4K displays. This is 3 datapaths that takes as input one RG45 and as output 4 hdmi with full hd resolution each.

Ah, in that case, it is normal and expected that it would appear as a single monitor, since the OS only sees one display output. I have edited the issue above.

[MickaelLafontaine]

One comment about the 3 x 4K displays. This is 3 datapaths that takes as input one RG45 and as output 4 hdmi with full hd resolution each.

Ah, in that case, it is normal and expected that it would appear as a single monitor, since the OS only sees one display output. I have edited the issue above.

However the preference's monitor panel indicates 14 displays in total :

• 2x regular full hd monitors
• 3x4 full HD monitors