all it is responding is 0 or 1. Nevertheless, post the first few seconds worth of output from the command /lib/nut/usbhid-ups -DD -a apc1 and we'll see what we can do. This will hopefully provide enough information to tell what the heck is going on. > So not sure about the startup issue. I guess we'll need to proceed to > driver debug? See above. Best regards, Arjen