[Shotwell] unmount error in PTP mode & sd cards

[Jim Nelson]

Camera support is one of the trickiest parts of Shotwell because of all the
systems at play.  Although I don't know all the under-the-hood interactions,
some of these problems may be timing (just giving everything enough time to
re-sync) and some may be a system getting into a bad state (including the
camera firmware itself).  We've seen an issue with the iPhone, for example,
where it wouldn't respond after an unmount unless given 50ms (or so) to
clear it's head (http://trac.yorba.org/ticket/189)

You won't see cameras through the mount command.  Cameras are mounted using
GNOME VFS, which is a user-space mounting system.  The easiest way to see
the mounted camera is via Nautilus, Go -> Computer.  If you see your camera
there, it's mounted (and must be unmounted for Shotwell to work with it.)

If for some reason Shotwell is unable to unmount the camera, you need to
unmount it manually from this screen.  Select the camera, right-click, and
select "Unmount Volume".

We'll look into the SD card problem: http://trac.yorba.org/ticket/1233

Also, I've reproduced your crasher.  The ticket's here:
http://trac.yorba.org/ticket/1232

When dealing with camera problems, I recommend using the latest gphoto
library.  Karmic comes with 2.4.6.  2.4.7 is the latest:
http://www.gphoto.org/

Cheers,

-- Jim

On Sun, Dec 27, 2009 at 5:11 AM, Ingo Lütkebohle <
iluetkeb at techfak.uni-bielefeld.de> wrote:

> Am 27.12.2009 14:08, schrieb Ingo Lütkebohle:
> > The thing is, the camera it not mounted (at least not according to
> > "mount") and when I click on its entry in Shotwell again, it imports
> > just fine.
>
> Update: It does indeed import fine, but after that, when it asks me
> whether I want the photos deleted from the camera and I say "Delete", it
> crashes with this error:
>
> ERROR:DataObject.vala:207:data_source_real_notify_membership_changed:
> assertion failed: (self->priv->is_destroyed)
>
> FWIW, this happens /after/ the photos have been deleted.
>
> Another update: When I start shotwell again, without detaching the
> camera, it picks it up fine. There may be some bad volume-manager
> interaction going on (I have set Shotwell as the app for photo imports
> in volume manager).
>
> cheers, Ingo
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