Do you press a certain key to get into bootloader mode when connecting via USB? I get a connection error message. Keyboard plugged in via USB, then starting the BMC and selecting the default "ps2avrGB & ps2avrGB_split" Target. "Error setting action: Communication error with device"
Stock firmware, only soldered in switches.
Ok, google was my friend: I had to just plug the keyboard to a different USB port, and ps2avrGB driver was installed correctly.