I never used any KVM but don't those have firmware/drivers for them? If so, I'd also make sure you're using the latest of each for it.
Other than that, I've noticed (through forums/threads) KVMs causing all types of issues. Digerati's advice of trying without it is very good and accurate.
Other than that, I've noticed (through forums/threads) KVMs causing all types of issues. Digerati's advice of trying without it is very good and accurate.