Comment 5 for bug 1257591

I'm getting the same issue. Interestingly however, when I use VirtualBox with a windowsXP VM, I dont face this issue !

[main] enable debug output for module 'nfc'
[nfc.clf] searching for reader with path 'usb'
[nfc.dev.transport] using pyusb version 1.x
[nfc.dev.transport] path matches '^(usb|)$'
[nfc.dev] trying usb:072f:2200
[nfc.dev] import nfc.dev.acr122
[nfc.dev.transport] >>> 6b050000000000000000ff00480000
[nfc.dev.transport] <<< 830a000000000002810041435231323255323133
[nfc.dev.acr122] GetFirmwareVersion called with timeout 100 ms
[nfc.dev.transport] >>> 6b070000000000000000ff00000002d402
[nfc.dev.transport] <<< 830a000000000002810041435231323255323133
Traceback (most recent call last):
  File "examples/tagtool.py", line 439, in <module>
    TagTool().run()
  File "/home/user/Downloads/shared/code/nfcpy/examples/cli.py", line 283, in run
    while self.run_once() and self.options.loop:
  File "/home/user/Downloads/shared/code/nfcpy/examples/cli.py", line 230, in run_once
    try: clf = nfc.ContactlessFrontend(device)
  File "/home/user/Downloads/shared/code/nfcpy/nfc/clf.py", line 105, in __init__
    if path and not self.open(path):
  File "/home/user/Downloads/shared/code/nfcpy/nfc/clf.py", line 156, in open
    self.dev = nfc.dev.connect(path)
  File "/home/user/Downloads/shared/code/nfcpy/nfc/dev/__init__.py", line 64, in connect
    device = driver.init(usb)
  File "/home/user/Downloads/shared/code/nfcpy/nfc/dev/acr122.py", line 92, in init
    chipset = Chipset(transport)
  File "/home/user/Downloads/shared/code/nfcpy/nfc/dev/acr122.py", line 50, in __init__
    super(Chipset, self).__init__(transport)
  File "/home/user/Downloads/shared/code/nfcpy/nfc/dev/pn53x.py", line 126, in __init__
    ic, ver, rev, support = self.get_firmware_version()
  File "/home/user/Downloads/shared/code/nfcpy/nfc/dev/pn53x.py", line 243, in get_firmware_version
    else: ic, ver, rev, support = data
ValueError: too many values to unpack