close all applications make the background become a black page

The user shouldn't be able to close the dash. dash should never be closed. And if for some reason dash crashes (and therefore gets estarted) that's an abnormal situation anyway, so it's expected that it doesn't look pretty.

Did you close the dash using the UI?

Was that in phone or on the desktop?

> Was that in phone or on the desktop?

It's on desktop. You can currently press the red close button on the
dash window to cause it to respawn. Button probably should be inactive,
but wallpaper shouldn't go away either :)

> It's on desktop. You can currently press the red close button on the
> dash window to cause it to respawn. Button probably should be inactive,
> but wallpaper shouldn't go away either :)

yup, the problem is that the background turns black. I guess it is because something wrong in Desktopstage.qml, maybe ApplicationWindow.qml, because the ApplicationManager gets nothing when no application is running.

This bug was fixed in the package unity8 - 8.02+15.04.20150409.1-0ubuntu1

---------------
unity8 (8.02+15.04.20150409.1-0ubuntu1) vivid; urgency=medium

  [ Albert Astals Cid ]
  * Focus the shutdown dialog (LP: #1417991)
  * Make url-dispatching scope activation when the dash is not on the
    main scopes (LP: #1364306)
  * We use autopilot3 now

  [ CI Train Bot ]
  * New rebuild forced.
  * Resync trunk. added: po/or.po

  [ Daniel d'Andrada ]
  * Make tst_PreviewListView and tst_GenericScopeView work in out-of-
    source builds
  * MouseArea that shows the indicators panel should cover the
    indicators bar only (LP: #1439318)
  * Surface gets active focus also with mouse clicks

  [ Josh Arenson ]
  * Add a mode option to unity8 for selecting greeter mode in the future
  * Remove PkgConfig include from Launcher plugin to fix cross-compile
    (LP: #1437702)

  [ Leo Arias ]
  * Fixed the check for string in the lock screen test. (LP: #1434518)

  [ Michael Terry ]
  * Make sure the edge tutorial is destroyed when we receive a call
    during the wizard. (LP: #1436349)
  * Skip parts of the edge tutorial that require a touch device (like
    spread and bottom edge). (LP: #1434712)

  [ Michael Zanetti ]
  * Don't hide stages just because they're empty (LP: #1439615)
  * [Launcher] fix bug where an item would disappear even though the app
    is running (LP: #1438172)

  [ Nick Dedekind ]
  * Fixed autopilot test failures related to udev input failure for
    power button.
  * Made improvements for laggy indicator backends (lp#1390136). (LP:
    #1390136)

  [ Pete Woods ]
  * GPS only goes active when the Dash is in the foreground (LP:
    #1434379)

  [ handsome_feng<email address hidden> ]
  * Modified the wrong time format in ScreenGrabber (LP: #1436006)
 -- CI Train Bot <email address hidden> Thu, 09 Apr 2015 14:01:11 +0000