[xubuntu-users] USB camera being intercepted?

[Petter Adsen]

On Wed, 25 Nov 2015 21:39:50 +0000
Peter Flynn <peter at silmaril.ie> wrote:

<snip>
> > 21:28:29 noah colord[879]: (colord:879): Cd-WARNING **: CdMain:  
> failed to emit DeviceAdded: failed to register object: An object is
> already exported for the interface org.freedesktop.ColorManager.Device
> at /org/freedesktop/ColorManager/devices/sysfs__null_
> 
> It's that last one that puzzles me.

That's nothing to be concerned about, it simply indicates the lack of
color management. Xubuntu does not install any tools for color
management by default, since XFCE does not use any. I don't think
Enlightenment does either.

> But in any case, it is an error when an unexpected, unwanted, and
> unnecessary system call claims prior ownership of a device intended
> for the end user. It is also an error when an application (eg
> Digikam) gives up so easily; it needs to be more robust, and if
> necessary stomp all over the bogus claim of ownership and gain
> control of the device.

Do you really want applications to stomp all over ownership, rather
than having to make sure applications get access to whatever they need?
That does not sound like a world I want to live in.

I'm not entirely sure about the "interface 0 claimed by usbfs" message,
but it could mean that the camera has been connected as an MTP device
rather than PTP, and Digikam wants the latter. Are there any settings
on the camera for how it connects over USB, like there are on Android
phones?

Petter

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