Present Mod / Swap chain issue

Development Cinematics & Media Virtual Production
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1

Hi,

I am having sync issue on an XR stage setup.
I have 4 render Nodes, each of them equipped with 2xQuadro RTX8000 with SLI.

As per the Unreal doc, in switchboard, each node should have a “present mode” showing “Hardware composed: Independant flip” .

I managed to obtain it after a fresh reboot of all nodes as per the screenshot:

953 883 128 - AnyDesk 10_19_2022 10_46_12 PM
953 883 128 - AnyDesk 10_19_2022 10_46_12 PM1899×382 94 KB

However, after stopping the instances of Unreal on all nodes through switchboard then relaunching them. Node 1 and Node 3 never go back to that mode and always show as N/A:

953 883 128 - AnyDesk 10_19_2022 10_48_50 PM
953 883 128 - AnyDesk 10_19_2022 10_48_50 PM1896×351 88.6 KB

It is always the same two nodes, and the only way to get them back to independent flip is to reboot Node 1 and 3. But that status persists only for the first launch of the UE instances.
If I stop them then relaunch… Node 1 and 3 are back to N/A.

Anyone has any clue what to look at to identify the issue?
I made sure PresentMon.exe on each node is set to “Run as Admin”.

2

I am having the exact same issue. It would be good if someone at Epic could chime in here. I am running 8 nodes and we have to switch levels all day long on shoots. This has become a hindrance to efficient shoot days.

image

3

To Answer my own question. I had to force switchboard listener to run as administrator.

4

I have the exact same problem, and its always-on node 01 and does not change

5

Is there anymore information on this? I’m running into a similar issue even though Listener is in admin mode.