On Sun, Feb 25, 2018 at 02:35:28PM -0500, Jeremy Bicha wrote: > I suggest looking into what xdg-utils does.
Looks like xdg-utils, or at least xdg-open is not the one to blame since it is calling gio open: $ sh -x $( which xdg-open) video.mp4 + check_common_commands video.mp4 + [ 1 -gt 0 ] + parm=video.mp4 + shift + [ 0 -gt 0 ] + [ -z ] + unset XDG_UTILS_DEBUG_LEVEL + [ 0 -lt 1 ] + xdg_redirect_output= > /dev/null 2> /dev/null + [ xvideo.mp4 != x ] + url= + [ 1 -gt 0 ] + parm=video.mp4 + shift + [ -n ] + url=video.mp4 + [ 0 -gt 0 ] + [ -z video.mp4 ] + detectDE + unset GREP_OPTIONS + [ -n GNOME ] + DE=gnome + [ xgnome = x ] + [ xgnome = x ] + [ xgnome = x ] + [ xgnome = xgnome ] + which gnome-default-applications-properties + DE=gnome3 + [ -f /run/user/1000/flatpak-info ] + [ xgnome3 = x ] + DEBUG 2 Selected DE gnome3 + [ -z ] + return 0 + open_gnome3 video.mp4 + gio help open + gio open video.mp4 + [ 0 -eq 0 ] + exit_success + [ 0 -gt 0 ] + exit 0 ** (exo-helper-1:20332): WARNING **: Could not open X display Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged. My mime setup for video files is mplayer and that seems to correctly there: $ xdg-mime query default video/mp4 userapp-mplayer-9GFM9U.desktop Testing changes to desktop files shows that exo-file-manager.desktop is to blame for this behavior. It does correctly set OnlyShowIn=XFCE; so I don't get why it gets used in a Gnome session: $ cat /usr/share/applications/exo-file-manager.desktop [Desktop Entry] Version=1.0 Type=Application Exec=exo-open --launch FileManager %u Icon=system-file-manager StartupNotify=true Terminal=false Categories=Utility;X-XFCE;X-Xfce-Toplevel; OnlyShowIn=XFCE; X-XFCE-MimeType=inode/directory;x-scheme-handler/trash; Name=File Manager ... But moving this file away from /usr/share/applications fixes external application starting from nautilus: # mv /usr/share/applications/exo-file-manager.desktop /root/ -Mikko
