Mouse interaction w/ CentOS in KDE seemed erratic, similar to using the Remote Supervisor Adapter to access the RAID management tool from IBM. When I first used the freeView 100, it would not allow me to access any of the pre-boot screens using the keyboard or mouse. I think this was related to USB being used for the inputs, and not really well supported by the BIOS, since I had USB Legacy enabled and it didn't seem to be helping. However, later it "cleared up". I switched it to PS/2, and it worked well then too.
This server did not seem to be able to USB boot, but when I attached a USB -> IDE adapter and tried a Knoppix CD on a DVD drive I had, it didn't boot either, and none of the boot options had USB. I think on this one, I was just out of luck for that.
The USB device was detected by CentOS after booting though
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on page 9, what does usb
USB Boot using KVM