[Nut-upsuser] Eaton Nova AVR repeated USBDEVFS_CONTROL failed cmd usbhid-ups

[Adam Pribyl]

I have nut 2.6.4-2.3+deb7u1 on debian 7 32bit, with UPS Eaton Nova AVR 
1250 connected via USB.

It happens several times a day that I get a message about

Apr  3 16:41:49 kernel: [422581.049671] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 4 ret -110
Apr  3 16:41:54 kernel: [422586.041057] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -110
Apr  3 16:41:54 kernel: [422586.086977] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -75
Apr  3 16:41:54 kernel: [422586.090986] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -71
Apr  3 16:41:54 kernel: [422586.094963] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -71
Apr  3 16:41:54 kernel: [422586.145875] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 4 ret -71
Apr  3 16:41:54 kernel: [422586.149868] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 4 ret -71
Apr  3 16:41:54 kernel: [422586.153861] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -71
Apr  3 16:41:54 kernel: [422586.157855] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -71
Apr  3 16:41:54 kernel: [422586.161847] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -71
Apr  3 16:41:54 kernel: [422586.165856] usb 5-1: usbfs: USBDEVFS_CONTROL 
failed cmd usbhid-ups rqt 161 rq 1 len 3 ret -71
Apr  3 16:41:54 kernel: [422586.331313] hub 5-0:1.0: port 1 disabled by 
hub (EMI?), re-enabling...
Apr  3 16:41:54 kernel: [422586.331377] usb 5-1: USB disconnect, device 
number 3
Apr  3 16:41:54 kernel: [422586.515007] hub 5-0:1.0: unable to enumerate 
USB device on port 1
Apr  3 16:41:55 kernel: [422587.569163] usb 5-1: new low-speed USB device 
number 5 using uhci_hcd
Apr  3 16:41:56 kernel: [422588.356065] usb 5-1: New USB device found, 
idVendor=0463, idProduct=ffff
Apr  3 16:41:56 kernel: [422588.356070] usb 5-1: New USB device strings: 
Mfr=1, Product=2, SerialNumber=0
Apr  3 16:41:56 kernel: [422588.356073] usb 5-1: Product: NOVA AVR
Apr  3 16:41:56 kernel: [422588.356076] usb 5-1: Manufacturer: EATON
Apr  3 16:41:58 kernel: [422589.633644] generic-usb 0003:0463:FFFF.0005: 
hiddev0,hidraw0: USB HID v1.00 Device [EATON NOVA AVR] on 
usb-0000:00:1d.0-1/input0

I tried many times repeated advice on the net to increase the pollinterval 
to 10s. It may decrease the number of "failures" but may be just a 
coincidence. I also sometimes receive a something that looks like false 
alarms but it could be that this UPS is just more sensitive than the 
other.

I may try to get
  /lib/nut/usbhid-ups -DD -a eaton
while the error happens if this helps. The same thing was happening on 
debian 6 with much older nut. I was hoping for upgrade to fix it, but it 
still happens.

Is there anything else in the NUT I may do to prevent this?

Thanks

Adam Pribyl