Hi James,
Forgot to note that we use two external mains powered USB hubs.
http://www.mbeat.com.au/product/mbea...with-switches/
Using the laptop's usb3 port to hub 1 which feeds 3 x DVI adapters + hub 2. Hub 2 in turn feeds the other 3 x DVI adapters. So all 6 DVI adapters and the two hubs are plugged into usb3 ports.
External mains powered hubs ensure we have enough amps to power the DVI adapters.
Is there anything else we can do to help identify the cause of the intermittent shutdown of the adapters?
Frank