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?? Ubuntu Server 16.04.1 LTS NUT 2.7.2-4ubuntu1 NUT installed from apt CP1500AVRLCDa Complete problem description, with any relevant traces, like system log excerpts, and driver debug output. You can obtain the latter using the following command, as root and after having stopped NUT: Problem Description: Ubuntu is able to communicate fine with the ups for several hours. However, the UPS is

...a for UPS [ups] is stale - check driver > Oct 6 17:30:57 kvm upsmon[3548]: Poll UPS [ups at localhost] failed - > Data stale > Oct 6 17:30:57 kvm upsmon[3548]: Communications with UPS > ups at localhost lost > Oct 6 17:30:57 kvm upssched[32410]: Executing command: notifycommbad My Tripplight SMART1500LCDT <https://www.amazon.com/gp/product/B009TZTGWK/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1> has the same problem, with the above preceded by: Oct 2 22:20:02 fairfax kernel: hub 1-1.1.1:1.0: port 4 disabled by hub (EMI?), re-enabling... Oct 2 22:20:02 fairfax kernel: usb 1-...

...[ups] is stale - check driver > Oct 6 17:30:57 kvm upsmon[3548]: Poll UPS [ups at localhost] failed - Data > stale > Oct 6 17:30:57 kvm upsmon[3548]: Communications with UPS ups at localhost > lost > Oct 6 17:30:57 kvm upssched[32410]: Executing command: notifycommbad > > My Tripplight SMART1500LCDT > <https://www.amazon.com/gp/product/B009TZTGWK/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1> > has the same problem, with the above preceded by: > > Oct 2 22:20:02 fairfax kernel: hub 1-1.1.1:1.0: port 4 disabled by hub > (EMI?), re-enabling... > Oct 2 22...