Comment 3 for bug 1247572

Same on Lumia 521. This is a popular phone, and it doesn't show the internal storage or sd at all, just freezes!

For me mtp-detect gives:

$ mtp-detect
Unable to open ~/.mtpz-data for reading, MTPZ disabled.libmtp version: 1.1.6

Listing raw device(s)
Device 0 (VID=0421 and PID=0661) is a Nokia Nokia Lumia WP8.
   Found 1 device(s):
   Nokia: Nokia Lumia WP8 (0421:0661) @ bus 3, dev 3
Attempting to connect device(s)
ignoring libusb_claim_interface() = -6PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
LIBMTP PANIC: failed to open session on second attempt
Unable to open raw device 0
OK.

Trying again gives:
Unable to open ~/.mtpz-data for reading, MTPZ disabled.libmtp version: 1.1.6

Listing raw device(s)
Device 0 (VID=0421 and PID=0661) is a Nokia Nokia Lumia WP8.
   Found 1 device(s):
   Nokia: Nokia Lumia WP8 (0421:0661) @ bus 3, dev 4
Attempting to connect device(s)
ignoring libusb_claim_interface() = -6PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
Error 2: PTP Layer error 02ff: get_all_metadata_fast(): could not get proplist of all objects.
Error 2: Error 02ff: PTP: I/O error
Error 2: PTP Layer error 02ff: get_handles_recursively(): could not get object handles.
Error 2: Error 02ff: PTP: I/O error
Error 2: PTP Layer error 02ff: get_handles_recursively(): could not get object handles.
Error 2: Error 02ff: PTP: I/O error
USB low-level info:
   bcdUSB: 512
   bDeviceClass: 0
   bDeviceSubClass: 0
   bDeviceProtocol: 0
   idVendor: 0421
   idProduct: 0661
   IN endpoint maxpacket: 512 bytes
   OUT endpoint maxpacket: 512 bytes
   Raw device info:
      Bus location: 3
      Device number: 4
      Device entry info:
         Vendor: Nokia
         Vendor id: 0x0421
         Product: Nokia Lumia WP8
         Vendor id: 0x0661
         Device flags: 0x00000000
Device info:
   Manufacturer: NOKIA
   Model: Lumia 521
   Device version: 8.0.10517.0
 .... and serial number and other info.