mr. eckhardt, have you considered translating the evoluent usb interface into one the kvm switch can understand with an atmel avr board?
nkl > I bought one of these ("Evoluent VerticalMouse 3 Rev 2", aka VM3R2). > > It doesn't work with my KVM (IOGear GCS1734, neither top of the line > nor junk), not with Linux or Plan 9: horizontal tracking is fine, but > vertical tracking goes only up. It works ok plugged directly into a > Linux box.