Comment 3 for bug 910964

As an update to this, I disabled the gphoto2 gvfs backend by running

sudo chmod -x /usr/lib/gvfs/gvfs-gphoto2-volume-monitor

to isolate issues to shotwell / libgphoto2. What I get is that the issue persists and actually trying to run an import is not necessary, its enough to just click on the USB PTP Camera item and let shotwell display the photo previews to then have a PTP I/O Error be signaled by

gphoto2 --list-files

The camera is at this point in an unusable state.

I'll update the yorba redmine report with this info.