Re: F16: Samsung Galaxy Tab 10.1 and MTP

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On 11/30/2011 08:59 AM, James Hogarth wrote:
Not sure it'll help, but in the case of you my Galaxy S2 smartphone, I
simply switched the phone to mass-storage mode.
(Settings->Applications->Development->USB debugging)
Once enabled, you can simply access the file-system on your device
like any other USB mass-storage device. (Disk-on-key, HDD, etc)

It is a problem we'll have to face soon however - even if the current
Galaxy Tab can be switch to mass storage...

The Galaxy Nexus (and thus reference for the next generation of
android phones/tablets) does not have a USB mass storage mode since it
does not have an SD card to unmount to present to the system. Rather
MTP is being used so that both the phone and the connected system can
have simultaneous access to the internal filesystem.

Right now we cannot say if future Samsung/Motorola/HTC/etc phones
based on ICS and the GN reference will follow a similar pattern or
not....

The FUSE based mtpfs can be found here but with the caveat that it
doesn't appear to have progress very far... and was just the first
google result for it - not sure if there is a competing effort:
http://code.google.com/p/mtpfs/

Relevant stuff about this situation can be found here:
http://www.pcsmax.com/samsung-galaxy-nexus-no-data-transfer-to-mac-and-linux-112776.html

James

More information about accessing the Galaxy Tab 10.1 using MTP.  I just bought a small MP3 player and connected it to my laptop via USB.  It was treated the same as the Galaxy Tab 10.1, it crashed Rhythmbox.  Before restarting Rhythmbox, I disconnected and reconnected the MP3 player.  To my surprise, I was able to access its memory as a file system.  Running mtp-detect or mtp-connect caused the connection to fail.  I was able to transfer files to the MP3 player successfully so long as Rhythmbox was not running (and probably other programs that use libmtp).

After some success with the MP3 player, I tried connecting the Galaxy Tab 10.1 without Rhythmbox running.  I was able to see some sort of file system.  It was not the file system that I expected or see with apps like Astro.  It was a flat file system with directories named 00000001 to 00000028 (counting in hex).  All these directories are mostly empty though a few have files with the same numeric naming scheme.  Nautilus is stating that "These files are on a digital audio player" and wants to open them with Rhythmbox.

It appears that while the Galaxy Tab 10.1 is using MTP, it is not quite following the specification that the mtp tools are expecting.  The mtp tools can detect that it is a Galaxy Tab 10.1 connected but when it attempts to connect the connection is refused.

  --
  Steven F. LeBrun

Quote: "Outside of a dog, a book is man's best friend. Inside a dog, it's too dark to read."
     -- Groucho Marx
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