Can't launch update-manager from Unity sidebar

[Stephen Rasku]

I originally asked a question on Ask Ubuntu:

http://askubuntu.com/questions/521576/cant-launch-software-updater-from-toolbar

But now I believe it's a bug.

Launching the Software Updater from the sidebar does not respond to clicks. It shows up when I hit `Alt-Tab` but t won't bring up the window when I switch to it and it is nowhere to be found on any of my desktops. I can also see `update-manager` in the process table:

    $ ps -ef | grep update-manager
    stephen 5565 1907 0 07:40 ? 00:00:04 /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
    stephen 5691 5621 0 08:04 pts/4 00:00:00 grep --color=auto update-manager

It seems like the update-manager is starting automatically somehow but not displaying. I can kill it from the command-line and click on the icon to launch it but it seems that it automatically gets into a bad state somehow.

I am running Unity on Ubuntu 14.04.1 LTS inside a VM.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.