Dear Maintainer,

I've connected and configured Advice PRS850 (a UPS with USB interface).

When I started Cheese program (a program which uses a USB webcam),
I received the following broadcast message:

"Communications with UPS advice@localhost lost"

When I exited Cheese, I received the following broadcast message:

"Communications with UPS advice@localhost established"

The webcam (a TASCORP USB2.0 JPEG WebCam) was connected to a USB2.0 interface
and the UPS was connected to a USB3.0 interface.

Switching the USB connectors of the webcam and the UPS solved the problem
for me.

I've also reported this bug for Cheese:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=771063

My /etc/nut/ups.conf :

[[[[
maxretry = 3

[advice]
    driver = blazer_usb
    port = /dev/ttyS0
    vendorid = 0665
    productid = 5161
]]]]

dmesg output:

[    1.317085] usb 4-1: new high-speed USB device number 2 using ehci-pci
[    1.405223] tsc: Refined TSC clocksource calibration: 3395.557 MHz
[    1.405228] Switching to clocksource tsc
[    1.449642] usb 4-1: New USB device found, idVendor=8087, idProduct=0024
[    1.449648] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    1.450058] hub 4-1:1.0: USB hub found
[    1.450104] hub 4-1:1.0: 8 ports detected
[    1.521492] usb 3-1.3: new low-speed USB device number 3 using ehci-pci
[    1.619257] usb 3-1.3: New USB device found, idVendor=0665, idProduct=5161
[    1.619262] usb 3-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    1.619265] usb 3-1.3: Product: USB to Serial
[    1.619268] usb 3-1.3: Manufacturer: INNO TECH
[    1.623072] hidraw: raw HID events driver (C) Jiri Kosina
[    1.625251] usbcore: registered new interface driver usbhid
[    1.625253] usbhid: USB HID core driver
[    1.626014] hid-generic 0003:0665:5161.0001: hiddev0,hidraw0: USB HID v1.00 Device [INNO TECH USB to Serial] on usb-0000:00:1a.0-1.3/input0
[    1.693685] usb 3-1.4: new full-speed USB device number 4 using ehci-pci
[    1.786441] usb 3-1.4: New USB device found, idVendor=17a1, idProduct=0128
[    1.786442] usb 3-1.4: New USB device strings: Mfr=32, Product=38, SerialNumber=0
[    1.786444] usb 3-1.4: Product: USB2.0 JPEG WebCam
[    1.786445] usb 3-1.4: Manufacturer: TASCORP
[    1.857918] usb 3-1.5: new low-speed USB device number 5 using ehci-pci
[    1.953554] usb 3-1.5: New USB device found, idVendor=192f, idProduct=0416
[    1.953555] usb 3-1.5: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[    1.953557] usb 3-1.5: Product: USB Optical Mouse
[    1.955908] input: USB Optical Mouse as /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.5/3-1.5:1.0/input/input0
[    1.956020] hid-generic 0003:192F:0416.0002: input,hidraw1: USB HID v1.11 Mouse [USB Optical Mouse] on usb-0000:00:1a.0-1.5/input0
[    2.026157] usb 3-1.6: new low-speed USB device number 6 using ehci-pci
[    2.124421] usb 3-1.6: New USB device found, idVendor=1c4f, idProduct=0016
[    2.124423] usb 3-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    2.124424] usb 3-1.6: Product: USB Keyboard
[    2.124425] usb 3-1.6: Manufacturer: SIGMACHIP
[    2.127151] input: SIGMACHIP USB Keyboard as /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.6/3-1.6:1.0/input/input1
[    2.127217] hid-generic 0003:1C4F:0016.0003: input,hidraw2: USB HID v1.10 Keyboard [SIGMACHIP USB Keyboard] on usb-0000:00:1a.0-1.6/input0

...

[  190.249219] usb 3-1.3: usbfs: USBDEVFS_CONTROL failed cmd blazer_usb rqt 33 rq 9 len 8 ret -110