<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body><div>Around March this year there was a thread on this mailing list “https://alioth-lists.debian.net/pipermail/nut-upsuser/2021-March/012332.html“.
I appear to be running into the exact same issue, so I was hoping there was some resolution I could borrow wisdom from. Within seconds of connecting the USB cable from a ProxMox 6 server (Kernel 5.4.128) to a Tripp Lite SU2200RTXLCD2U , the UPS triggers “OUTPUT OFF REMOTE SHUTDOWN” and…cuts off output.
Amazingly, this stack (NUT + server + USB + TrippLite UPS) worked beautifully at first, but has exhibited this behavior ever since I tested with “upsmon -c fsd”, and persisted through reboots.
Was there any resolution to the prior discussion I can borrow from? Any flag or setting I should check on NUT? I already loaded the newest available firmware on the TrippLite unit. If I tail the upsmon log(s) when I plug the UPS in, the shutdown happens before the driver recognizes the device, leading me to assume like the previous poster this is out in the kernel/USB system somewhere.
Thanks,
Aaron
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