Just in case you're that other guy who's running Mint 17 / Xfce with fluxbox...
When booting into fluxbox, my Canon camera wouldn't show up in thunar, though 'gphoto2' commands worked* to list and get image files. It worked OK in Mint 16 w/thunar.
Also, thunar -> Edit -> Prefs -> Advanced -> Configure (removable/cameras) did nothing.
- Login to Xfce, then ... Advanced -> Configure worked...tho I didn't change anything. The camera showed up in thunar (w/xfce).
- Login to fluxbox and the camera shows up.
$ gphoto2 --list-files
$ gphoto2 --get-all-files
$ gphoto2 --delete-all-files