Comment 12 for bug 387791

Notification bubbles are not a "notification system", they are just one notification mechanism. See <https://wiki.ubuntu.com/NotificationDesignGuidelines> for an overview of other mechanisms.

gnome-disk-utility used to use a notification bubble for this situation. But with Notify OSD, when a bubble disappeared, the unmounting wouldn't necessarily have finished yet. So we fixed gnome-disk-utility to use a progress window instead, as it really should have in the first place. (After all, other kinds of file moving and copying use a progress window.)

From the design specification for the progress window <https://wiki.ubuntu.com/NotifyOSD#gnome-disk-utility>: "The title and icon for the progress window should be the name and icon for the volume." For that reason, in the absence of an explanation for why it should change icons part-way through, I'm closing this bug report.

If there are indeed "two popups" instead of one, please report a separate papercut about that. And if the window sometimes doesn't appear at all, please report a separate papercut about that. Either of those situations could have made it seem as if two separate icons should be used.