[Nut-upsuser] MGE EllipseMAX 1500 shuts down after a few hours

[raul]

The UPS is connected to the following environment:
OS: Debian GNU/Linux 9.6 (stretch)
NUT version: 2.7.4-5
Device output from lsusb: 0463:ffff MGE UPS Systems UPS
Model name: MGE EllipseMAX 1500
URLs:
http://powerquality.eaton.com/Products-services/Backup-Power-UPS/Ellipse-MAX-eol.aspx?cx=97&GUID=7BB6CD53-9F6D-4D62-B326-1099F137BF8D
http://powerquality.eaton.com/68558.aspx?cx=97

The problem is that at some point, after being online for a while, the 
UPS shuts down, cutting the power of all devices without sending any 
command. The log of the master monitor registers a USB error before the 
events of the OS booting process after turning on again the UPS. I have 
attached the output

Dec  1 21:35:18 openmediavault kernel: [19503.643123] usb 3-2: usbfs: 
USBDEVFS_CONTROL failed cmd usbhid-ups rqt 161 rq 1 len 6 ret -110
Dec  1 21:35:26 openmediavault kernel: [19511.835644] usb 3-2: usbfs: 
USBDEVFS_CONTROL failed cmd usbhid-ups rqt 161 rq 1 len 5 ret -110

I have uploaded the debug output to pastebin: 
https://pastebin.com/s9JaZ6kK


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://alioth-lists.debian.net/pipermail/nut-upsuser/attachments/20181201/a7c84669/attachment.html>