Issue when ejecting busy device from the Unity 2D Shell

Bug Description

[Test Case]
1. Plug an external device (e.g. USB stick)
2. Make it busy (e.g. go to it in a terminal)
3. Try to safe eject the device
-> Verify the volume is busy dialog appears
-> Verify there is no "Unity 2d Shell" tile in the launcher

[Regression Potential]
In the almost-impossible scenario the fix might prevent things that should show in the Launcher from showing. But since it's a very easy check, that's impossible to do.

Original description:

Ubuntu 12.10 64bits
Unity 2D 5.12

Insert a USB stick and make it busy (I opened a mp3 with RhythmBox (and the device was still busy after it was read but that'll be another bug)).
Ask Unity 2D to Eject the key. A popup appears for a confirmation.
Confirm, the popup is destroyed but respawn.
Cancel, the popup is destroyed but the Unity-2D-Shell icon appears in the Launcher.
Ask Unity-2D-Shell for quiting the launcher Unity-2D-Shell, Unity-2D-Shell quits and gnome-session doesn't relaunch it.
When I said quit, I meant the Launcher window was destroyed but the process remained active, and I needed to kill the process for gnome-session relaunch unity-2d-shell process.

I launched Unity-2D-Shell in a terminal and I get this when trying to umount the key :

unity-2d-shell: [CRITICAL] GLib-GObject: g_signal_handler_disconnect: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
unity-2d-shell: [WARNING] GLib-GObject: invalid (NULL) pointer instance
unity-2d-shell: [CRITICAL] GLib-GObject: g_signal_handler_disconnect: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
unity-2d-shell: [WARNING] GLib-GObject: invalid (NULL) pointer instance
unity-2d-shell: [CRITICAL] GLib-GObject: g_signal_handler_disconnect: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
unity-2d-shell: [WARNING] GLib-GObject: invalid (NULL) pointer instance
unity-2d-shell: [CRITICAL] GLib-GObject: g_signal_handler_disconnect: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
unity-2d-shell: [CRITICAL] GLib-GObject: g_object_weak_unref: assertion `G_IS_OBJECT (object)' failed

Adding unity since it has the same problem that pressing "force eject" does nothing and the dialog loops forever.

Removed unity, since the "force eject" does nothing is orthogonal to the problem that one can quit the shell from the launcher as described in this bug

Fixed the fact that Unity-2d-shell appeared in the launcher and you could quit it. The fact that force ejecting a busy device does not work is not Unity-2d fault but somewhere in GIO, as it also happens in regular Unity. I suggest to open a new bug about it.

Hello Aurélien, or anyone else affected,

Accepted unity-2d into precise-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/unity-2d/5.14.0-0ubuntu1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Tested the fix, the devices dialog appears correctly.

This bug was fixed in the package unity-2d - 5.14.0-0ubuntu1

---------------
unity-2d (5.14.0-0ubuntu1) precise-proposed; urgency=low

* New upstream release (LP: #1060262):
- [Launcher] [Multi-monitor] Removing a non running app tile from a
launcher should remove it from all (LP: #988739)
- Panel Titlebar double click is emitted for any mouse button (LP: #736491)
- Launcher does not hide if shown while dragging a file (LP: #1002308)
- icon isn't reset when clearing the search query (LP: #973225)
- Issue when ejecting busy device from the Unity 2D Shell (LP: #997786)
- Sticky edges don't work in RTL (LP: #984092)
- pips are not correctly updated when plugin in a second monitor
(LP: #1003943)
- [dash] Unable to maximize (LP: #918648)
- all panels have same window focus on multiple monitors unity2d
(LP: #930147)
- Dash will not open files under Greek folders (LP: #1002710)
- Launcher does not respond to changes in icon theme (LP: #605475)
- [panel] Invisible items in systray (LP: #703389)
- [panel] Ignores "enabled" property on top-level menus (LP: #850017)
* Reverted some quantal-specific commits which are no longer relevant
-- Lukasz 'sil2100' Zemczak <email address hidden> 2012年10月30日 09:59:49 +0100

The verification of this Stable Release Update has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.