Mouse/Keyboard/Macros not working in CIMC KVM

[Steven-Williams-83]

UCS C-220M3 v3.0.4e Cannot use mouse or keyboard in KVM launch for esxi config changes. I also cannot use keyboard on baremetal when booting into ESXi. Using Java 8u351, which seems to be working fine, just KVM things not working. Ideas?

[Steven Tardy]

Is USB disabled?
Does [F6] (or some other function key) work in the BIOS before ESXi is booted?

Have seen mouse/keyboard not work if USB is disabled (for 'security').
Re-enabling USB allowed the KVM mouse/keyboard to start working again.