gphotofs fails to mount properly

[zenaan]

gphotofs fails to mount:

• Connect canon camera via usb

• switch on camera

• Gnome Files shows "Canon Digital Camera", mouse-over popup says:
  "gphoto2://Canon_Inc._Canon_Digital_Camera_bf00619c05495f1d31cbbdbb292eeb10/"

• clicking in Files on the Canon... virtual mount, show DCIM/ and MISC/ as expected

• now to use gphotofs to access via cmd line:
  cd
  mkdir camera
  gphotofs camera

• journalctl shows this happened just after the gphotofs command was run (not entirely sure this is related, but pretty sure it is):
  Dec 12 09:39:55 zen-L7 gnome-shell[1968]: Failed to query filesystem: method Gio.File.query_filesystem_info_async: At least 4 arguments required, but only 3 passed

ls camera/
------->> 20231212@09:34:10 <<-------
ls: reading directory 'camera/': Device or resource busy

• clicking on the "camera/" virtual mount which did appear in Files, shows "Folder is Empty"

• "Canon..." virtual mount still shows the expected contents

• workaround: searching the /run/ found this:
  /run/user/1000/gvfs/gphoto2:host=Canon_Inc._Canon_Digital_Camera_bf00619c05495f1d31cbbdbb292eeb10
  which contains the folders and files in the camera.

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Next bug, fusermount -u camera unmounts both mounts, not one

When I run the following command:
fusermount -u camera

• BOTH the "camera" virtual mount created by gphotofs, AND the "Canon..." virtual mount created by Gnome vfs, are unmounted!!

• Expected behaviour: ONLY the gphotofs mount should be unmounted - the one that I named on the command line.

• Workaround: switch off and on, or reconnect, the camera. Gnome vfs mount reappears.