For Christmas I got this great IOGear MiniView Micro USB Plus 2-port KVM. Tonight I hooked it up to my Slackware server and had some problems with it recognizing the mouse now that it was connected via USB. My PC is an old Dell GX110 ~ 3 yrs old. It will work with a USB keyboard & mouse. I made sure USB EMulation was enabled in BIOS, but I am not sure it was necessary.
Within Slackware, I had to make the following changes
|/usr/sbin/gpm -m /dev/mouse -t ps2||/usr/sbin/gpm -m /dev/input/mice -t ps2|
|# /sbin/modprobe hid||/sbin/modprobe hid|
|# /sbin/modprobe usbmouse||/sbin/modprobe usbmouse|
|# /sbin/modprobe usbkbd||/sbin/modprobe usbkbd|
|Option "Protocol" "auto"||Option "Protocol" "IMPS/2"|
|Option "Device" "/dev/mouse"||Option "Device" "/dev/input/mice"|