@Miyuki Hello again.
That’s a shame. Are you sure it’s not supported. For simple shutdown via NUT you don’t need across the board support, just to know if the power has gone. I take it you have referenced the hardware compatibility list referenced within our Web-UI. Copied here for references:
Note that there are many APC Back-UPS models mentioned there. And that they mostly use the usbhid-ups, solis, or genericups (with a upstype=* setting). And one is listed again the apcsmart driver. It may very well be worth trying each of these drivers. Or, if you haven’t already, research others attempts as finding a working driver.
Our technical wiki on our own NUT implementation is here:
That may be useful for testing purposes.
All we do is shutdown. So no, nothing special required; bar executing a proper shutdown before the back-up (battery) power is likely to run-out. Or cancel if the wall power returns in the mean time to cover short power outages without having to manually power up the machine again, assuming you didn’t execute an immediate shutdown down.
Hope that helps.