ubuntu GNOME live session background not set correctly

[Tim Lunn]

In the Ubuntu GNOME Live session, the background is being set to a solid blue background rather than the image of the gnome blinds that should be set.

It looks like casper is wiping the picture-uri setting during boot

From boot, a series of backgrounds are getting set, by the time we land at ubiquity screen.
1. blue blinds (very briefly, might be plymouth?)
2. solid grey (presumably this comes from a call to set_high_contrast() in casper-a11y-enable)
3. solid blue + ubiquity screen (this solid blue background remains after loading into gnome-shell)

ProblemType: BugDistroRelease: Ubuntu 13.10
Package: casper 1.335
ProcVersionSignature: Ubuntu 3.10.0-5.14-generic 3.10.2
Uname: Linux 3.10.0-5-generic x86_64
ApportVersion: 2.11-0ubuntu1
Architecture: amd64
CasperVersion: 1.335
Date: Wed Jul 24 01:15:35 2013
LiveMediaBuild: Ubuntu-GNOME 13.10 "Saucy Salamander" - Alpha amd64 (20130724)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bashSourcePackage: casper
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.casper.conf: 2013-07-24T00:50:53.956000

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1204312

[Tim Lunn (darkxst)]

This is actually happening in ubiquity-dm, the gsettings that are overridden here, actually carry over to our live session.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubiquity - 2.15.15

---------------
ubiquity (2.15.15) saucy; urgency=low

  [ Tim Lunn ]
  * Add Ubuntu GNOME background to ubiquity-dm (LP: #1204312)
  * Use gnome-shell as wm in ubiquity-dm on Ubuntu GNOME (LP: #1214732)
  * export XDG_SESSION_ID to provide access to hijacked logind session

  [ Dmitrijs Ledkovs ]
  * Add gnome-shell as alternative window manager dependency on the
    ubiquity binary package.
  * Enable U1 page, if U1 is part of the image.
  * Do not try to install U1 keyring into encrypted home directories, not
    supported at the moment. (LP: #1217143)
  * Automatic update of included source packages: partman-basicmethods
    55.
 -- Dmitrijs Ledkovs <email address hidden> Thu, 29 Aug 2013 01:26:09 +0100