-> gvfs
As Martin says in comment #4, Nautilus' behavior didn't change here anytime recently, but gvfs/udisks apply different heuristics now, which are reflected in the options available to the GIO clients like Nautilus.
-> gvfs
As Martin says in comment #4, Nautilus' behavior didn't change here anytime recently, but gvfs/udisks apply different heuristics now, which are reflected in the options available to the GIO clients like Nautilus.