"Error initializing camera: -53: Could not claim the USB device"

Israel israeldahl at gmail.com
Wed Sep 24 02:18:43 UTC 2014

Hi John!
I would check out some of the documentation on the gvfs...
However you can try
gvfs-mount --unmount /<location>/
where <location> is the actual location.
You can also use
gvfs-mount -o
to watch what it is dong when you plug it in.
(it monitors the output)
man gvfs-mount
will give you more information.
You can also type
man gvfs<TAB><TAB>
(Use the actual TAB key) to see all the gvfs related commands listed.
This should at least get you pointed in the right direction

On 09/23/2014 05:29 PM, John Hupp wrote:
> I plugged a Kodak EasyShare C182 (supporting PTP file transfer) into a
> 14.04.1 desktop today over USB and it responded with:
> "Error initializing camera: -53: Could not claim the USB device"
> OK'ing out of that, it then offered to open the device in the file
> manager, where it had mounted 3 devices.  One with no contents,
> another with DCIM and MISC folders, and another with something-store1
> and something-store2 folders.  (I suppose there would be separate
> devices for internal memory and an SD card, but I don't know why there
> would be 3 devices.)
> It was then only possible to unmount 1 of the 3 devices.  To prevent
> corruption, I powered down the PC before unplugging the camera.
> Under 13.04, it responded:
> "Error initializing camera: -60: Could not lock the device"
> And then it opened in the file manager, again showing 3 devices, only
> one of which I could unmount, so again I powered down to disconnect.
> ------------------------------------------------------------------------
> 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 mounted 2 devices, both with DCIM and MISC folders.  I
> was only able to unmount one of the devices and so powered down to
> disconnect.
> ------------------------------------------------------------------------
> 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 this
> machine already has the prescribed libghoto2 update that should fix
> the described bug.
> There is also this Launchpad Answer regarding error -53, but it does
> not mention the unmount 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 errors and the unmount problem are both troubling, but if I could
> find a manual unmount command (perhaps with gvfs?), at least I would
> have a workaround that would not involve rebooting.
> Does anyone have the lowdown on all this?  What's the best available
> solution?


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