Sony NWZ-E354 not detected as MTP device (mtp-detect reports UNKNOWN)

[Troy R.]

Plugging in my Sony Walkman NWZ-E354 reveals that it is only seen as a USB Mass Storage device, and not as a fully-MTP capable device. Functionally, the player works fine for transferring and listening to music, podcasts, and watching video (WMA only) as a UMS device. However, Playlists, Album Art, and other extended functionality is missing.

Looking at the device with mtp-detect yielded nothing until I tried as root with sudo, and then I recieved the message

> Device 0 (VID=054c and PID=04cb) is UNKNOWN.
> Please report this VID/PID and the device model to the libmtp development team
> Found 1 device(s):
> 054c:04cb @ bus 1, dev 13

ending with an unsuccessful attempt to communicate with the device. Ideally, I should be able to mount this device as either MTP or UMS, since both protocols are fully supported by the player.

Thanks, and logs follow below.

$ mtp-detect
libmtp version: 1.0.3

Listing raw device(s)
   No raw devices found.

$ sudo mtp-detect
[sudo] password for troyr:
libmtp version: 1.0.3

Listing raw device(s)
Device 0 (VID=054c and PID=04cb) is UNKNOWN.
Please report this VID/PID and the device model to the libmtp development team
   Found 1 device(s):
   054c:04cb @ bus 1, dev 13
Attempting to connect device(s)
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22PTP_ERROR_IO: Trying again after re-initializing USB interface
inep: usb_get_endpoint_status(): Device or resource busy
outep: usb_get_endpoint_status(): Device or resource busy
usb_clear_halt() on IN endpoint: Device or resource busy
usb_clear_halt() on OUT endpoint: Device or resource busy
usb_clear_halt() on INTERRUPT endpoint: Device or resource busy
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22LIBMTP PANIC: Could not open session! (Return code 767)
  Try to reset the device.
Unable to open raw device 0
OK

$ lsb_release -rd
Description: Ubuntu 10.10
Release: 10.10

$ apt-cache policy mtp-tools
mtp-tools:
  Installed: 1.0.3-4
  Candidate: 1.0.3-4
  Version table:
 *** 1.0.3-4 0
        500 http://ca.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages
        100 /var/lib/dpkg/status

[Troy R. (dsm-iv-tr)]

Please note that I'm more than willing to patch libmtp to work with this device - I need a starting point to jump into, though. Start with libmtp? Start with hal?

Thanks!

[Alessio Treglia (quadrispro)]

On Mon, Apr 25, 2011 at 3:12 AM, Troy R. <email address hidden> wrote:
> Please note that I'm more than willing to patch libmtp to work with this
> device - I need a starting point to jump into, though. Start with
> libmtp? Start with hal?

Have a look at this:
http://libmtp.sourceforge.net/newdevice.php

Regards,

--
Alessio Treglia          | www.alessiotreglia.com
Debian Developer         | <email address hidden>
Ubuntu Core Developer    | <email address hidden>
0FEC 59A5 E18E E04F 6D40 593B 45D4 8C7C DCFC 3FD0

[Troy R. (dsm-iv-tr)]

Thanks, Alessio. I'll definitely have a look later in the week!

[Michael Heaton (gigabz666)]

If you try libmtp 1.0.6-2 (you can find it in natty), you'll find more output and you don't need to use the sudo command for mtp-detect. However, it still doesn't show in banshee.

[Alessio Treglia (quadrispro)]

Fixed with libmtp 1.1.3-1 available in Precise.