[Lubuntu] How to unmount a camera from the command line?

Phill Whiteside PhillW at Ubuntu.com
Fri Nov 2 01:10:56 UTC 2012

Hi John,

I've found my little minicom usb camera / mic device. It does not get
mounted by PCManFM, but does appear if I check

phillw at piglet:~$ ls /dev/video*

Which changes to

phillw at piglet:~$ ls /dev/video*
/dev/video0  /dev/video1

when I plug it in.

I suspect that as my device is a real dumb web-cam, has yours got in built
memory? If it has, then that would explain it being mounted as a storage

I'm following the hints and tips from the wiki area [1] The Multimedia guys
on the forum are far better placed to assist you[2].


1. https://help.ubuntu.com/community/Webcam#Configuring_Webcam_Software
2. http://ubuntuforums.org/forumdisplay.php?f=334

On 1 November 2012 23:59, John Hupp <lubuntu at prpcompany.com> wrote:

>  Thanks!
> The home page is at http://entangle-photo.org/
> Since Entangle is not in the official repos, I installed it from GetDeb:
> http://www.getdeb.net/software/Entangle
>  On 11/1/2012 7:43 PM, Phill Whiteside wrote:
> I'd expect USB flash drives to be auto mounted (The screams of "I plugged
> my flash drive in & it didn't mount - do not worth thinking about :) )
>  I'm in no way any expert on this, but IIRC, when I plugged my USB webcam
> in a few cycles ago, it launched Cheese and not PCManFM. Things will have
> changed and my laptop as of them is no longer, this one has a built in one.
> If you have a link to Entangle I'd be happy to install it & see how it gets
> on.
>  Regards,
>  Phill.
> On 1 November 2012 23:06, John Hupp <lubuntu at prpcompany.com> wrote:
>>  Perhaps it is too eager, I don't know.  It seems like standard behavior
>> with removable storage -- it does the same thing with USB flash drives,
>> which is also what Windows does.
>> It would also be interesting to figure out why Entangle locks up when it
>> tries to unmount the camera.
>> But in the meantime I'm very eager for a work-around.  I've put in a lot
>> of research and testing time on this over the last few weeks, and it
>> seems that I'm close to a decent solution with Entangle.  (I like it
>> very much when things work the way they should, and I prefer to see the
>> "right" solution, but I'll admit to some battle-weariness with confronting
>> one issue after another.)
>>  On 11/1/2012 6:42 PM, Phill Whiteside wrote:
>> Hi John,
>>  from what you describe I think PCManFM is being maybe just a little too
>> eager to mount anything that arrives in a USB port. As such, I'd suggest
>> raising a bug against PCManFM in the first instance, it can always get
>> re-allocated once the dev-team have had chance to look into it.
>>  Regards,
>>  Phill.
>> On 1 November 2012 22:36, John Hupp <lubuntu at prpcompany.com> wrote:
>>>  I'm trying to get a Canon Powershot G1 USB-connected camera working
>>> with remote capture (tethering) using either Entangle or Gtkam.
>>> Both apps get tripped up on the fact that Lubuntu auto-mounted the camera.
>>> Gtkam simply generates an error message about the camera already being
>>> in use.  Entangle notes the same condition and offers to unmount the
>>> camera, but approving that causes the program to lock up.
>>> Either program launches OK if I manually unmount the camera from pcmanfm
>>> first.
>>> So I'd like to launch the camera program from a script that first
>>> unmounts the camera.
>>> Post #2 in http://ubuntuforums.org/showthread.php?t=967104 had a
>>> solution in the command "gvfs-mount -s gphoto2," but gvfs-mount is not
>>> installed by default in Lubuntu and is not available from the default
>>> repos.
>>> I also tried "sudo umount /home/<user>/.gvfs," which was the mount
>>> point suggested to me by "sudo mount."  That ran without error, but the
>>> camera did not seem to be truly unmounted, and both cam apps errored as
>>> before.
>>> What's my best solution in Lubuntu?
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>>> https://wiki.ubuntu.com/phillw
>  --
> https://wiki.ubuntu.com/phillw

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