As you can read on https://bugzilla.gnome.org/show_bug.cgi?id=641873 the specified behaviour seems to appear only with some nvidea chipsets. Could the bug be a driver issue?
** Bug watch added: GNOME Bug Tracker #641873 https://bugzilla.gnome.org/show_bug.cgi?id=641873 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/792085 Title: Automatic remount of safely removed drive To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/792085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
