Comment 289 for bug 85488

My Benq S2W 3300U ID:

Bus 001 Device 002: ID 04a5:20b0 Acer Peripherals Inc. (now BenQ Corp.) S2W 3300U/4300U
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 1.00
  bDeviceClass 255 Vendor Specific Class
  bDeviceSubClass 255 Vendor Specific Subclass
  bDeviceProtocol 255 Vendor Specific Protocol
  bMaxPacketSize0 8
  idVendor 0x04a5 Acer Peripherals Inc. (now BenQ Corp.)
  idProduct 0x20b0 S2W 3300U/4300U
  bcdDevice 1.20
  iManufacturer 1 Color
  iProduct 2 FlatbedScanner 22
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 39
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x40
      (Missing must-be-set bit!)
      Self Powered
    MaxPower 100mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 3
      bInterfaceClass 255 Vendor Specific Class
      bInterfaceSubClass 255 Vendor Specific Subclass
      bInterfaceProtocol 255 Vendor Specific Protocol
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x02 EP 2 OUT
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0008 1x 8 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x83 EP 3 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0008 1x 8 bytes
        bInterval 16
Device Status: 0x0001
  Self Powered