With Debian Sid/unstable using Nautilus to copy large movie files, for example bigger than 200 MB, from a Canon PowerShot SX40 HS, it fails with an unknown error. (Unfortunately I was not able to find any error messages.) After that the camera LED keeps blinking – like during file transfer – although no files should be transferred anymore. This is even the case when closing Nautilus. So I guess the connection is not closed properly.

        $ lsusb
        Bus 002 Device 002: ID 04a9:3238 Canon, Inc.

Using Gtkam everything works. So it seems to be a GVFS problem. Looking at the upstream commit history, I see some mutex/locking commits. Though I do not know if those would solve this issue.

        commit c90f496faeb3451819c1d96f24abeb0d66013ef4
        Author: Michael Terry <michael.terry@canonical.com>
        Date:   Wed Oct 10 15:41:55 2012 -0400

            gphoto2: make sure to not call g_mutex_clear twice, causing a crash
            
            https://bugzilla.gnome.org/show_bug.cgi?id=685909


-- System Information:
Debian Release: 7.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages gvfs-backends depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.12.1-3
ii  gconf-gsettings-backend [gsettings-backend]  3.2.5-1.1
ii  gvfs                                         1.12.3-2
ii  gvfs-common                                  1.12.3-2
ii  gvfs-daemons                                 1.12.3-2
ii  gvfs-libs                                    1.12.3-2
ii  libarchive12                                 3.0.4-2
ii  libavahi-client3                             0.6.31-1
ii  libavahi-common3                             0.6.31-1
ii  libavahi-glib1                               0.6.31-1
ii  libbluetooth3                                4.99-2
ii  libc6                                        2.13-37
ii  libcdio-cdda1                                0.83-4
ii  libcdio-paranoia1                            0.83-4
ii  libcdio13                                    0.83-4
ii  libdbus-1-3                                  1.6.8-1
ii  libdbus-glib-1-2                             0.100-1
ii  libexpat1                                    2.1.0-1
ii  libgcrypt11                                  1.5.0-3
ii  libglib2.0-0                                 2.33.12+really2.32.4-3
ii  libgphoto2-2                                 2.4.14-2
ii  libgphoto2-port0                             2.4.14-2
ii  libgudev-1.0-0                               175-7.1
ii  libimobiledevice2                            1.1.1-4
ii  libplist1                                    1.8-1
ii  libsmbclient                                 2:3.6.6-3
ii  libsoup-gnome2.4-1                           2.38.1-2
ii  libsoup2.4-1                                 2.38.1-2
ii  libxml2                                      2.8.0+dfsg1-7
ii  psmisc                                       22.20-1

Versions of packages gvfs-backends recommends:
ii  gnome-keyring  3.4.1-5

Versions of packages gvfs-backends suggests:
ii  obex-data-server  0.4.5-1+b3
ii  samba-common      2:3.6.6-3

-- no debconf information