Unwanted display swaping at startup - please help

[martelvincentv10]

Hi,
We are using Resolume Arena for a videomaping exhibition in a zoo, consisting of 5 display outputs. Every morning, Resolume is automatically started on the PC (which stays on 24/7) and shut down at the end of the day. Resolume version used: 7.5.0 rev77960 31 august 2021.
The PC is equipped with Radeon RX Vega GPU and AMC Ryzen 9 3900X 12-core processor (graphics card with 6- ouputs, 5- for mapping and 1- for desktop). Driver Adrenalin 23.5.2 (latest, updated recently).
Most of the time, Resolume keeps on swaping displays at startup. I have updated the display drivers, Windows is up to date, and I don't know what else can be done to solve this problem.
I checked the advanced output setting and found something really odd (see screen capture below):
On the left menu, "Screen left 2 (disp 3) ok" indicates that "Display 3" is assigned, but if I right-click to get the details of the output devices it is indicated that "Display 4" is the one assigned...

Everything comes back to normal once the displays are manually re-assigned to what they were before Resolume swapped them.
Thanks for your help!
V.

[Arvol]

Have you looked into using an 8 output SDI card like a Black Magic Decklink Quad or an AJA Corvid 88? The whole EDID handshake game "should be stable" but with any OS it may change without reason. This comes from the OS and not from Arena. BUT, With SDI Output cards, you don't play the EDID handshake game, so that method is much more stable for install's

[martelvincentv10]

Thank you Arvol for the reply!
I checked the products you suggested and notice the output outlets are SD/HD which I am not familiar with. Do you know how I connect the five projectors (Optoma ZH606TST-W Projector - HDMI) to the card?
Do I need to add some type of converter?
Thanks,
V.

[Arvol]

https://www.amazon.com/Blackmagic-Desig ... 077QQWJYF/
^These should get you. You can even power them from the projector so no PSU needed.