Israel on the Lubuntu users list urged me to bring my observations
here. So:
Plugging a Kodak EasyShare C182 (supporting PTP file transfer) into a
Lubuntu 14.04.1 desktop over USB, it responds with:
"Error initializing camera: -53: Could not claim the USB device"
OK'ing out of that, it then offers to open the device in the file
manager, where it mounts 3 filesystems. One with no contents, another
with DCIM and MISC folders, and another with something-store1 and
something-store2 folders. I have not tested rigorously, but it seems
that the actual file collections are duplicates.
If I then unmount one of the filesystems, it disappears, and the other
two remain visible but not mounted. They disappear when I power off and
unplug the camera.
For comparison, under 13.04, the same camera responded:
"Error initializing camera: -60: Could not lock the device"
And then it opened in the file manager, again showing 3 filesystems as
above.
------------------------------------------------------------------------
For a partial comparison, I plugged a Canon Powershot G1 into the
14.04.1 desktop and there was no error, it offered to open in file
manager, and it showed 2 mounted filesystems, both with DCIM and MISC
folders and duplicate file collections. If I unmount one of the
instances it disappears and and the other remains visible but
unmounted. That disappears when I power off and unplug the camera.
------------------------------------------------------------------------
Searching for non-ancient explanations (of which there are many), I did
find this popular bug:
PTP Cameras not working on 14.04, works flawlessly on 12.04
<https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/1296275>
But that report does not reference either of these errors, and my
machine already has the prescribed libghoto2 update that should fix the
described bug.
------------------------------------------------------------------------
I installed Shotwell. Now plugging in a camera results in Shotwell
being offered alongside the file manager as choices to mount the
storage.** There is also a checkbox where one could choose to always
use Shotwell instead of being offered the choice.
[**Though for the Kodak there is still the initial Error -53 popup to OK
through. I see this Launchpad Answer regarding error -53 and Shotwell,
but it does not mention the multiple filesystems problem: Unable to
fetch previews from the camera: Could not claim the USB device (-53)
<https://answers.launchpad.net/ubuntu/+source/shotwell/+question/157569> ]
The Shotwell interface reasonably shows just one filesystem represented
for either the Canon or the Kodak. When one is done
previewing/importing and closes Shotwell, it automatically unmounts the
camera storage once again, and the camera can be unplugged.
------------------------------------------------------------------------
But after exiting Shotwell, if I then open PCManFM, I see just one,
unmounted instance of the Canon (don't recall the Kodak behavior on this
issue). If I try to mount it, I get an error:
The name:1.30 was not provided by any .service files. (And I can OK out
of there, but it does not mount the storage.)
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