Bug#928058: gvfs-backends: Bogus MTP errors? Everything works but errors pop up. Occurs in XFCE and CINNAMON but not in GNOME

[aPpYe]

Package: gvfs-backends
Version: 1.38.1-3
Severity: important

Dear Maintainer,

   * What led up to the situation?

     I am testing the Cinnamon desktop version of Debian.
     I plugged in my android phone to browse and manipulate
     the filesystem.

     Using a Samsung Galaxy S7 as an example, upon plugging in
     the device, before enabling MTP, I see the following error:

        Unable to open folder for SAMSUNG Android
        Cache invalid, retry (internally handled)

     Once I enable MTP on a device, the following error also
     appears:

        Count not display "mtp://SAMSUNG_SAMSUNG_Android_98545a76/"
        Error: No such interface "org.gtk.vfs.Mount" on object at
        path /org/gtk/vfs/mount/1
        Please select another viewer and try again.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

     I tried this on a variety of different Android devices,
     and a couple of different laptops and a VM.

   * What was the outcome of this action?

     Similar behavior was exhibited in all situations.

   * What outcome did you expect instead?

     I expect to be able to browse and manipulate a filesytem
     over MTP without receiving these error messages.

   * NOTES:

     If running MATE, the cache error does not appear, but the
     mtp:// error does appear.

     If running GNOME, no errors appear.

     In all cases, I am able to browse and manipulate the
     filesystem without issue, regardless of whether or not I
     acknowledge the error messages.

     More details can be found in the original form post here:

        http://forums.debian.net/viewtopic.php?f=19&t=141683

     It was here where it was suggested to me to file a bug
     against gvfs-backends.



-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gvfs-backends depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.30.1-2
ii  gvfs                                         1.38.1-3
ii  gvfs-common                                  1.38.1-3
ii  gvfs-daemons                                 1.38.1-3
ii  gvfs-libs                                    1.38.1-3
ii  libarchive13                                 3.3.3-4
ii  libavahi-client3                             0.7-4+b1
ii  libavahi-common3                             0.7-4+b1
ii  libavahi-glib1                               0.7-4+b1
ii  libc6                                        2.28-8
ii  libcdio-cdda2                                10.2+0.94+2-4
ii  libcdio-paranoia2                            10.2+0.94+2-4
ii  libcdio18                                    2.0.0-2
ii  libgcrypt20                                  1.8.4-5
ii  libgdata22                                   0.17.9-3
ii  libglib2.0-0                                 2.58.3-1
ii  libgoa-1.0-0b                                3.30.1-2
ii  libgphoto2-6                                 2.5.22-3
ii  libgphoto2-port12                            2.5.22-3
ii  libgudev-1.0-0                               232-2
ii  libimobiledevice6                            1.2.1~git20181030.92c5462-1
ii  libmtp9                                      1.1.16-2
ii  libnfs12                                     3.0.0-2
ii  libplist3                                    2.0.1~git20190104.3f96731-1
ii  libpolkit-gobject-1-0                        0.105-25
ii  libsmbclient                                 2:4.9.5+dfsg-3
ii  libsoup2.4-1                                 2.64.2-2
ii  libusb-1.0-0                                 2:1.0.22-2
ii  libxml2                                      2.9.4+dfsg1-7+b3
ii  psmisc                                       23.2-1

Versions of packages gvfs-backends recommends:
ii  gnome-keyring  3.28.2-5

Versions of packages gvfs-backends suggests:
ii  bluez-obexd   5.50-1
pn  samba-common  <none>

-- no debconf information