We purchased a KMMLED156 from Dell and connected it to 2 Dell Poweredge hosts running VMWare 7.03, a Datto backup appliance, and a Windows 10 desktop, using an IOGear GCS24U KVM switch.

The Windows 10 Desktop displays fine using it, but when switching to any of the other devices, they do not display. Pressing the OSD menu while one of the 3 non-displaying connections is active does nothing. On the windows 10 connection it shows up.

With an external monitor hooked up, the Keyboard and mouse function as they should. Only the display of the VMWare hosts and Datto do not work.

Any suggestions for this?