I have a APC ups: device.mfr: American Power Conversion device.model: Back-UPS XS 700U I use: driver = usbhid-ups port = auto vendorid = 051d And I set a few values: offdelay = 300 ondelay = 70 lowbatt = 33 This all works fine. However I noticed that often these values would get reset: initial value: ups.delay.shutdown: 300 Later value:? ?ups.delay.shutdown: 20 Since this happened a lot, I added a cronjob to daily check it. It triggers about every 8-10 days. I can reset these with: # systemctl restart nut-driver at qnapups and everything is fine. But from logs: Nov 16 17:38:49 zbox systemd[1]: Started nut-driver at qnapups.service - Network UPS Tools - device driver for NUT device 'qnapups'. Nov 16 17:39:05 zbox usbhid-ups[1526738]: sock_connect: keeping default synchronous mode Nov 22 19:15:20 zbox usbhid-ups[1526738]: ups_status_set: seems that UPS [qnapups] is in OL+DISCHRG state now. Is it calibrating or do you perhaps want to set 'onlinedischarge' option? Some UPS models (e.g. CyberPower UT series) emit OL+DISCHRG when offline. Nov 23 21:05:22 zbox usbhid-ups[1526738]: nut_libusb_get_interrupt: No such device (it may have been disconnected) Hint: Some lines were ellipsized, use -l to show in full. at 9:00 on the 24th my cronjob noticed the values had reset. So Just after Nov 22 19:15:20 (ie 9:00 on 23rd) ...the values were still OK Just after Nov 23 21:05:22 (ie 9:00 on 24th) ... the values changed. My personal theory is that the USB powered device in the APC box "crashed" and rebooted, resetting some values on the way. Now I don't think that NUT can do a whole lot about this .... probably my simplest fix is to trigger the "systemctl restart" when I spot the change. But it does suggest to me , it would be useful if I could trigger some actions ( e.g. systemctl restart ?) when NUT detects some error conditions: ? ? 1: the OL+DISCHRG ... ? ? ? 2: the (temporary) loss of the USB device -- Graeme -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://alioth-lists.debian.net/pipermail/nut-upsuser/attachments/20251124/a74437f1/attachment.htm>