More information.
It seems to me pyusb libusb0 backend is trying to enumerate
the device but somehow does not finish the job properly under
Mac OS X.

mymacmini:test xiaofanc$ export PYUSB_DEBUG_LEVEL=debug
mymacmini:test xiaofanc$ export LIBUSB_DEBUG=4
mymacmini:test xiaofanc$ cat test_libusb0.py
#!/usr/bin/env python
#
import usb
import usb.backend.libusb0

for d in usb.core.find(find_all=True,backend=usb.backend.libusb0.get_backend()):
   print type(d)        
   dev = d._ctx.dev
   print type(dev)
mymacmini:test xiaofanc$ python test_libusb0.py
[timestamp] [threadID] facility level [function call] <message>
--------------------------------------------------------------------------------
[ 0.000005] [00001507] libusbx: debug [libusb_init] created default context
[ 0.000029] [00001507] libusbx: debug [libusb_init] libusbx v1.0.12.10538
[ 0.000079] [0000010f] libusbx: debug [event_thread_main] creating
hotplug event source
[ 0.000582] [0000010f] libusbx: debug [event_thread_main] thread ready
to receive events
[ 0.000633] [00001507] libusbx: debug [usbi_add_pollfd] add fd 4 events 1
2012-07-16 22:36:13,372 DEBUG:usb.backend.libusb0:_LibUSB.enumerate_devices()
[ 0.000947] [00001507] libusbx: debug [libusb_get_device_list]
[ 0.003499] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa000000
[ 0.003529] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.003537] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.003544] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.003550] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.003557] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.003563] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.003569] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.003576] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05ac
[ 0.003582] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x8006
[ 0.003589] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0200
[ 0.003595] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x02
[ 0.003601] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x01
[ 0.003607] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.003614] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.003637] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.003651] [00001507] libusbx: debug [process_new_device] found
device with address 1 port = 0 parent = 0x7fe0b3c83a38 at 0x0
[ 0.004125] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa100000
[ 0.004359] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.004375] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.004382] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.004389] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.004396] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.004402] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x02
[ 0.004408] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.004415] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x0424
[ 0.004421] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x2513
[ 0.004428] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0bb3
[ 0.004434] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x00
[ 0.004440] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x00
[ 0.004446] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.004453] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.004479] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.004488] [00001507] libusbx: debug [process_new_device] found
device with address 2 port = 1 parent = 0x7fe0b3c6eca8 at
0x7fe0b3c839a0
[ 0.004909] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa110000
[ 0.005078] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.036365] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.067892] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.099240] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.130780] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.162410] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.193557] [00001507] libusbx: debug [darwin_cache_device_descriptor]
could not retrieve device descriptor 0a5c:4500: device not responding.
skipping device
[ 0.193661] [00001507] libusbx: debug [libusb_unref_device] destroy device 0.0
[ 0.194588] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa120000
[ 0.195879] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.195925] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.195938] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.195950] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.195961] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.195972] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.195984] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.195996] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x04f2
[ 0.196007] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x0760
[ 0.196018] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0100
[ 0.196029] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.196040] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.196051] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.196062] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.196114] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.196131] [00001507] libusbx: debug [process_new_device] found
device with address 4 port = 2 parent = 0x7fe0b5200098 at
0x7fe0b3c6ec10
[ 0.197035] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa130000
[ 0.197486] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.197522] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.197535] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.197554] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.197565] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.197577] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.197589] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.197609] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05e3
[ 0.197618] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x0606
[ 0.197627] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0702
[ 0.197637] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x00
[ 0.197645] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x01
[ 0.197654] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.197663] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.197705] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.197718] [00001507] libusbx: debug [process_new_device] found
device with address 5 port = 3 parent = 0x7fe0b5200158 at
0x7fe0b3c6ec10
[ 0.198596] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa113000
[ 0.198854] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.230403] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.261371] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.292903] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.324238] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.355487] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.385874] [00001507] libusbx: warning
[darwin_cache_device_descriptor] could not retrieve device descriptor
05ac:8281: device not responding. skipping device
[ 0.385911] [00001507] libusbx: debug [libusb_unref_device] destroy device 0.0
[ 0.386537] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa132000
[ 0.387202] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.387225] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.387236] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.387247] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.387257] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.387268] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.387279] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.387289] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x045e
[ 0.387301] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x0773
[ 0.387311] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0674
[ 0.387322] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.387332] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.387343] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.387354] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.387394] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.387410] [00001507] libusbx: debug [process_new_device] found
device with address 6 port = 2 parent = 0x7fe0b3e01af8 at
0x7fe0b52000c0
[ 0.387979] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa133000
[ 0.388444] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.388463] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.388474] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.388483] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.388493] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.388502] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.388511] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.388520] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x04d8
[ 0.388529] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0xfa2e
[ 0.388538] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0001
[ 0.388548] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.388557] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.388566] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x03
[ 0.388575] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.388610] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.388625] [00001507] libusbx: debug [process_new_device] found
device with address 7 port = 3 parent = 0x7fe0b51001b8 at
0x7fe0b52000c0
[ 0.389136] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa131000
[ 0.389940] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.389959] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.389970] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.389980] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.389990] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.390000] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.390010] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.390020] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x046d
[ 0.390029] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0xc054
[ 0.390039] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x5400
[ 0.390049] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.390060] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.390069] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.390078] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.390118] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.390134] [00001507] libusbx: debug [process_new_device] found
device with address 9 port = 1 parent = 0x7fe0b51002b8 at
0x7fe0b52000c0
[ 0.390653] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd000000
[ 0.390689] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.390700] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.390711] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.390722] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.390732] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.390742] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.390753] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.390763] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05ac
[ 0.390774] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x8006
[ 0.390785] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0200
[ 0.390794] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x02
[ 0.390803] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x01
[ 0.390812] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.390823] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.390859] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.390873] [00001507] libusbx: debug [process_new_device] found
device with address 1 port = 0 parent = 0x7fe0b3e01c48 at 0x0
[ 0.391323] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd100000
[ 0.391438] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.391458] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.391469] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.391479] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.391489] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.391500] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x02
[ 0.391509] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.391519] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x0424
[ 0.391529] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x2513
[ 0.391540] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0bb3
[ 0.391550] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x00
[ 0.391559] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x00
[ 0.391569] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.391579] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.391618] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.391632] [00001507] libusbx: debug [discovered_devs_append] need to
increase capacity
[ 0.391644] [00001507] libusbx: debug [process_new_device] found
device with address 2 port = 1 parent = 0x7fe0b3e01d08 at
0x7fe0b3e01bb0
[ 0.392205] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd110000
[ 0.493881] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.538864] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.538908] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.538930] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.538947] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.538965] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.538982] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.538999] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.539025] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05ac
[ 0.539044] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x8242
[ 0.539062] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0016
[ 0.539081] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.539097] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.539114] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.539134] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.539206] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.539234] [00001507] libusbx: debug [process_new_device] found
device with address 3 port = 1 parent = 0x7fe0b5100548 at
0x7fe0b3e01c70
[ 0.540224] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd130000
[ 0.540701] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.540721] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.540734] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.540745] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0xef
[ 0.540757] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x02
[ 0.540769] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.540781] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.540823] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x0ac8
[ 0.540838] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x3420
[ 0.540848] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0100
[ 0.540860] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.540872] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.540884] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.540895] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.540939] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.540957] [00001507] libusbx: debug [process_new_device] found
device with address 4 port = 3 parent = 0x7fe0b5200218 at
0x7fe0b3e01c70
[ 0.541083] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.1
[ 0.541102] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.2
[ 0.541116] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.4
[ 0.541130] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.5
[ 0.541143] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.6
[ 0.541155] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.7
[ 0.541165] [00001507] libusbx: debug [libusb_unref_device] destroy device 250.9
[ 0.541173] [00001507] libusbx: debug [libusb_unref_device] destroy device 253.1
[ 0.541181] [00001507] libusbx: debug [libusb_unref_device] destroy device 253.2
[ 0.541189] [00001507] libusbx: debug [libusb_unref_device] destroy device 253.3
[ 0.541199] [00001507] libusbx: debug [libusb_unref_device] destroy device 253.4
[ 0.541288] [00001507] libusbx: debug [libusb_get_device_list]
[ 0.543101] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa000000
[ 0.543141] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.543154] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.543167] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.543178] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.543189] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.543201] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.543213] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.543224] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05ac
[ 0.543235] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x8006
[ 0.543247] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0200
[ 0.543259] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x02
[ 0.543270] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x01
[ 0.543281] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.543293] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.543334] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.543351] [00001507] libusbx: debug [process_new_device] found
device with address 1 port = 0 parent = 0x7fe0b5100528 at 0x0
[ 0.543824] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa100000
[ 0.544131] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.544149] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.544156] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.544163] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.544169] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.544176] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x02
[ 0.544183] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.544189] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x0424
[ 0.544196] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x2513
[ 0.544202] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0bb3
[ 0.544208] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x00
[ 0.544215] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x00
[ 0.544221] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.544227] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.544254] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.544264] [00001507] libusbx: debug [process_new_device] found
device with address 2 port = 1 parent = 0x7fe0b5100418 at
0x7fe0b5100490
[ 0.544660] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa110000
[ 0.544817] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.576141] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.607607] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.639057] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.670446] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.702011] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.733159] [00001507] libusbx: debug [darwin_cache_device_descriptor]
could not retrieve device descriptor 0a5c:4500: device not responding.
skipping device
[ 0.733264] [00001507] libusbx: debug [libusb_unref_device] destroy device 0.0
[ 0.734290] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa120000
[ 0.735538] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.735585] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.735604] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.735617] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.735635] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.735653] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.735672] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.735690] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x04f2
[ 0.735707] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x0760
[ 0.735723] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0100
[ 0.735740] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.735756] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.735773] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.735790] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.735864] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.735892] [00001507] libusbx: debug [process_new_device] found
device with address 4 port = 2 parent = 0x7fe0b3c264b8 at
0x7fe0b5100380
[ 0.736986] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa130000
[ 0.737325] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.737352] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.737368] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.737384] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.737400] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.737416] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.737431] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.737446] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05e3
[ 0.737462] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x0606
[ 0.737478] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0702
[ 0.737493] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x00
[ 0.737509] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x01
[ 0.737526] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.737542] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.737602] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.737625] [00001507] libusbx: debug [process_new_device] found
device with address 5 port = 3 parent = 0x7fe0b51005e8 at
0x7fe0b5100380
[ 0.738510] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa113000
[ 0.738713] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.770005] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.801369] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.832769] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.864231] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 0.894870] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe00002ed. sleeping for 30 ms before
trying again
[ 0.925949] [00001507] libusbx: warning
[darwin_cache_device_descriptor] could not retrieve device descriptor
05ac:8281: device not responding. skipping device
[ 0.925991] [00001507] libusbx: debug [libusb_unref_device] destroy device 0.0
[ 0.926650] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa132000
[ 0.927352] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.927396] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.927408] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.927420] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.927430] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.927440] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.927451] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.927461] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x045e
[ 0.927472] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x0773
[ 0.927481] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0674
[ 0.927491] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.927501] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.927512] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.927521] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.927561] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.927577] [00001507] libusbx: debug [process_new_device] found
device with address 6 port = 2 parent = 0x7fe0b3c6eca8 at
0x7fe0b5100550
[ 0.928057] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa133000
[ 0.928604] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.928647] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.928658] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.928669] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.928679] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.928690] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.928700] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.928710] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x04d8
[ 0.928720] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0xfa2e
[ 0.928730] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0001
[ 0.928740] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.928750] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.928760] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x03
[ 0.928770] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.928807] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.928822] [00001507] libusbx: debug [process_new_device] found
device with address 7 port = 3 parent = 0x7fe0b5200098 at
0x7fe0b5100550
[ 0.929305] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfa131000
[ 0.930177] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.930195] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.930205] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.930213] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 0.930220] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.930227] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 0.930233] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 0.930240] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x046d
[ 0.930246] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0xc054
[ 0.930254] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x5400
[ 0.930260] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 0.930267] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 0.930273] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.930280] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.930306] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.930315] [00001507] libusbx: debug [process_new_device] found
device with address 9 port = 1 parent = 0x7fe0b3e019a8 at
0x7fe0b5100550
[ 0.930768] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd000000
[ 0.930792] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.930800] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.930807] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.930814] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.930820] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.930827] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 0.930833] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.930840] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05ac
[ 0.930846] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x8006
[ 0.930853] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0200
[ 0.930859] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x02
[ 0.930865] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x01
[ 0.930872] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.930878] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.930901] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.930910] [00001507] libusbx: debug [process_new_device] found
device with address 1 port = 0 parent = 0x7fe0b52002f8 at 0x0
[ 0.931385] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd100000
[ 0.931558] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 0.931577] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 0.931587] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 0.931596] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x09
[ 0.931603] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 0.931610] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x02
[ 0.931616] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 0.931623] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x0424
[ 0.931630] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x2513
[ 0.931636] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0bb3
[ 0.931643] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x00
[ 0.931649] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x00
[ 0.931656] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 0.931662] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 0.931687] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 0.931696] [00001507] libusbx: debug [discovered_devs_append] need to
increase capacity
[ 0.931704] [00001507] libusbx: debug [process_new_device] found
device with address 2 port = 1 parent = 0x7fe0b5200158 at
0x7fe0b5200260
[ 0.932175] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd110000
[ 1.034228] [00001507] libusbx: debug [darwin_cache_device_descriptor]
kernel responded with code: 0xe000404f. sleeping for 30 ms before
trying again
[ 1.080250] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 1.080286] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 1.080297] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 1.080307] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0x00
[ 1.080316] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x00
[ 1.080325] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x00
[ 1.080336] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x08
[ 1.080346] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x05ac
[ 1.080356] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x8242
[ 1.080366] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0016
[ 1.080376] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 1.080386] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 1.080396] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 1.080407] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 1.080451] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 1.080467] [00001507] libusbx: debug [process_new_device] found
device with address 3 port = 1 parent = 0x7fe0b3e01bb8 at
0x7fe0b52000c0
[ 1.081060] [00001507] libusbx: debug [process_new_device] allocating
new device for location 0xfd130000
[ 1.081609] [00001507] libusbx: debug [darwin_cache_device_descriptor]
device descriptor:
[ 1.081637] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDescriptorType:    0x01
[ 1.081648] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdUSB:             0x0200
[ 1.081659] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceClass:       0xef
[ 1.081669] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceSubClass:    0x02
[ 1.081680] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bDeviceProtocol:    0x01
[ 1.081689] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bMaxPacketSize0:    0x40
[ 1.081699] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idVendor:           0x0ac8
[ 1.081709] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 idProduct:          0x3420
[ 1.081720] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bcdDevice:          0x0100
[ 1.081731] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iManufacturer:      0x01
[ 1.081741] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iProduct:           0x02
[ 1.081757] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 iSerialNumber:      0x00
[ 1.081767] [00001507] libusbx: debug [darwin_cache_device_descriptor]
 bNumConfigurations: 0x01
[ 1.081815] [00001507] libusbx: debug [darwin_check_configuration]
active config: 1, first config: 1
[ 1.081832] [00001507] libusbx: debug [process_new_device] found
device with address 4 port = 3 parent = 0x7fe0b3e01aa8 at
0x7fe0b52000c0
[ 1.081988] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.082002] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.084634] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.084654] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.087105] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.087122] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.089536] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.089552] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.091790] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.091804] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.093925] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.093939] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.096016] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.096028] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.098246] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.098259] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.100414] [00001507] libusbx: debug [parse_configuration] skipping
descriptor 0xb

[ 1.100429] [00001507] libusbx: debug [parse_endpoint] skipping descriptor 25
[ 1.100448] [00001507] libusbx: debug [parse_endpoint] skipping descriptor b
[ 1.100463] [00001507] libusbx: debug [parse_endpoint] skipping descriptor 25
[ 1.100483] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.100493] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.102598] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.102611] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0
[ 1.104745] [00001507] libusbx: debug [libusb_get_device_descriptor]
[ 1.104765] [00001507] libusbx: debug [libusb_get_config_descriptor] index 0



-- 
Xiaofan

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Reply via email to