unity upgrade prevents full desktop after login

[Barry Warsaw]

On wily with latest apt-get update & dist-upgrade I noticed a problem where after logging in via the lightdm greeter, the full desktop would not come up. The screen blanks and it appears as if I get my normal desktop solid background, but the global menu bar never comes up, and no default apps, or other ways to start anything (e.g. gnome-do doesn't start, can't bring up a terminal, etc.) The machine is not unresponsive though... you can ssh into it.

After an extensive session of bisecting upgrades I narrowed it down to unity, unity-schemas, unity-services. I've apt-mark held all three and the rest of the dist-upgrade worked fine.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: unity 7.3.2+15.04.20150420-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-17.17-generic 3.19.6
Uname: Linux 3.19.0-17-generic x86_64
ApportVersion: 2.17.2-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Tue May 19 14:31:02 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-11-22 (178 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141120)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Barry Warsaw (barry)]

This appears to be fixed with today's full dist-upgrade.