I installed a 2-port USB KVM switch (non-branded as it was what I could get at the time) to operate between a 2012 server and a 2008 server. Out of interest, the 2012 server ran USB I/O devices, but the 2008 was using a PS2 keyboard.
After connecting the KVM switch, the 2012 server was perfectly accessible, but the 2008 server would not recognise the USB mouse plugged into the KVM switch (it seemed fine with the USB keyboard, however.
I had a quick look in the BIOS on the 2008 server, but all seemed to be in order in terms of supporting USB devices (as I expected).
Any suggestions as to where to go next with this as we have left the PS2 mouse connected to the 2008 server and the KVM switch is servicing the keyboard to both servers and the mouse to just the 2012 server.
The monitor works perfectly with both, as expected, hence why no mention of it has been made.
I will be able to test our solution/s on the October 13th due to annual leave, unless within the next 48 hours (just so that you don't consider any lack of response an indication that I don't require/ want/ appreciate your assistance.
Thanks in advance for all your help!