Hi Charles,

thank you very much for your reply, and here is the out put of "lsusb -vvv -d 051d:"

Bus 001 Device 005: ID 051d:0002 American Power Conversion Uninterruptible Power Supply
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x051d American Power Conversion
  idProduct          0x0002 Uninterruptible Power Supply
  bcdDevice            0.06
  iManufacturer           3 American Power Conversion
  iProduct                1 Smart-UPS 3000 RM FW:666.6.I USB FW:7.4
  iSerial                 2 US1035211796
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration         11 1
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower               30mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode           33 US
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength    1064
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0006  1x 6 bytes
        bInterval             100
Device Status:     0x0001
  Self Powered

Bus 001 Device 004: ID 051d:0002 American Power Conversion Uninterruptible Power Supply
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x051d American Power Conversion
  idProduct          0x0002 Uninterruptible Power Supply
  bcdDevice            0.06
  iManufacturer           3 American Power Conversion
  iProduct                1 Smart-UPS 3000 RM FW:666.6.I USB FW:7.4
  iSerial                 2 US1035211809
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration         11 1
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower               30mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode           33 US
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength    1064
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0006  1x 6 bytes
        bInterval             100
Device Status:     0x0001
  Self Powered


On 6/1/2016 10:48 AM, Charles Lepple wrote:
On May 31, 2016, at 1:11 AM, Tomas Tang <[email protected]> wrote:
Hi All,

                 I get very strange UPS problem from RspberryPI mode B (both 
version 2 and 3).

                 Here is our environment:

                 OS:                         Raspbian 8.0, Ubuntu 16.04 and 
Ubuntu 14.04

                 Platform:             RaspberryPi Mode B version 2 and version 
3

                 NUT:                      tested version 2.6.3, 2.7.1 and 
2.7.2 (from ports.ubuntu.com)

                 UPS:                       APC Smart-UPS 3000 RM and APC 
Smart-UPS 1500 RM

                 Cable:                    USB

                 Problem detail:

                 NUT can read all the information after installed, but once you 
unplug the input power, the status didn’t get changed and there is no log 
related to NUT from syslog.
Please check the mailing lists to see if there are any other reports for these 
particular models over USB. The only full dump I could find was with the 
apcsmart driver: http://networkupstools.org/ddl/APC/Smart-UPS_3000_RM.html

There is a "pollonly" flag that might help, but it is supposed to be selected 
automatically. What does 'lsusb -vvv -d 051d:' return when run as root?



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