Comment 27 for bug 77226

FWIW, I have a USB Wacom Graphire4 6x8. "lsusb -v" snippet:

Bus 001 Device 002: ID 056a:0016 Wacom Co., Ltd
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 1.01
  bDeviceClass 0 (Defined at Interface level)
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 8
  idVendor 0x056a Wacom Co., Ltd
  idProduct 0x0016
  bcdDevice 4.03
  iManufacturer 1
  iProduct 5
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 34
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x80
      (Bus Powered)
    MaxPower 40mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 3 Human Interface Devices
      bInterfaceSubClass 1 Boot Interface Subclass
      bInterfaceProtocol 2 Mouse
      iInterface 0
        HID Device Descriptor:
          bLength 9
          bDescriptorType 33
          bcdHID 1.00
          bCountryCode 0 Not supported
          bNumDescriptors 1
          bDescriptorType 34 Report
          wDescriptorLength 98
         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 0x0008 1x 8 bytes
        bInterval 10
cannot read device status, Operation not permitted (1)