Comment 9 for bug 908917

Samuel,

below is the output of lsusb for my ACR122. The only relevant differences I could spot are version 2.03 vs. 2.07 and the max powere re

Bus 001 Device 005: ID 072f:2200 Advanced Card Systems, Ltd
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 1.10
  bDeviceClass 0 (Defined at Interface level)
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 8
  idVendor 0x072f Advanced Card Systems, Ltd
  idProduct 0x2200
  bcdDevice 2.03
  iManufacturer 1 ACS
  iProduct 2 ACR122U PICC Interface
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 93
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x80
      (Bus Powered)
    MaxPower 200mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 3
      bInterfaceClass 11 Chip/SmartCard
      bInterfaceSubClass 0
      bInterfaceProtocol 0
      iInterface 0
      ChipCard Interface Descriptor:
        bLength 54
        bDescriptorType 33
        bcdCCID 1.00
        nMaxSlotIndex 0
        bVoltageSupport 7 5.0V 3.0V 1.8V
        dwProtocols 2 T=1
        dwDefaultClock 4000
        dwMaxiumumClock 4000
        bNumClockSupported 0
        dwDataRate 10752 bps
        dwMaxDataRate 250000 bps
        bNumDataRatesSupp. 0
        dwMaxIFSD 256
        dwSyncProtocols 00000000
        dwMechanical 00000000
        dwFeatures 00020040
          Auto parameter negotation made by CCID
          Short APDU level exchange
        dwMaxCCIDMsgLen 271
        bClassGetResponse 00
        bClassEnvelope 00
        wlcdLayout none
        bPINSupport 0
        bMaxCCIDBusySlots 1
      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 2
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x02 EP 2 OUT
        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 0x82 EP 2 IN
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 0
Device Status: 0x0000
  (Bus Powered)