Unity plugin disabled during upgrade from 11.10 to 12.04

[Steve Magoun]

I upgraded my system from 11.10 to 12.04-dev. After the upgrade I logged in; unity was not running after login. I had a desktop, but no launcher or panel. Running 'unity --replace' from a VT did not launch unity.

I launched ccsm and discovered that the unity plugin was disabled. When I tried to enable the unity plugin, I got a note about conflicting settings:

"The new value for the edge binding for the action 'Reveal Mode' in plugin 'Ubuntu Unity Plugin' conflicts with the action 'Flip Left' of the 'Desktop Wall' plugin. Do you wish to disable 'Flip Left' in the 'Desktop Wall' plugin?"

I selected "Enable Reveal Mode Anyway" and unity immediately launched.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.0.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-10.18-generic 3.2.1
Uname: Linux 3.2.0-10-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,imgjpeg,decor,snap,imgpng,place,dbus,session,mousepoll,regex,commands,vpswitch,wall,neg,move,gnomecompat,resize,imgsvg,resizeinfo,text,animation,workarounds,fade,expo,scale,ezoom,unityshell,scaleaddon]
Date: Thu Jan 26 18:00:44 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-01-26 (0 days ago)

[Didier Roche-Tolomelli (didrocks)]

I'll try to remove the conflicting plugins. However, this is not what made you not having unity on ugprade (there is a race in compiz which is tracked in another bug report)

[Launchpad Janitor (janitor)]

This bug was fixed in the package compiz - 1:0.9.7.0~bzr2995-0ubuntu5

---------------
compiz (1:0.9.7.0~bzr2995-0ubuntu5) precise; urgency=low

  * Change some keybindings as per design (LP: #878820, #891757, #751050)
    debian/patches/ubuntu-config.patch:
    - Show desktop is now Super + d
    - Super + Up maximize the window
    - Super + Down restore the window
    - Super + W initiate scale for all windows on current ws
    - Control + Alt + NumPad 5 is used to switch/restore maximize state
    - Control + Alt + NumPad 0 is used to minimize current window
    - Ensure we don't have any conficting keys anymore (LP: #922354)
  * 01_ctrl_alt_*tea*.patch:
    - Merged into ubuntu-config.patch, no reason to keep it separated
  * debian/compiz-gnome.gconf-defaults, debian/rules, debian/unity.ini:
    - Set the new plugin order with the incoming unity change as the default
 -- Didier Roche <email address hidden> Wed, 22 Feb 2012 13:44:25 +0100