Comment 0 for bug 973220

As instructed, this is a split from bug 972310.
https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/972310

Related bugs: (to be added in a few minutes)

Consider an item available from non-Canonical repositories, e.g. Oracle's Virtual Box Guest Additions (direct from the Oracle website).

This example uses Oracle's Virtual Box Guest Additions when running from Virtual Box. (Actually, you can replicate this in a system that is not running in a Virtual Box, by omitting steps 1 & 2.)

1. Run Ubuntu in a Virtual Box (the latest one available from virtualbox.org).

2. Install the Extension Pack (i.e. Guest Additions).

3. Open Ubuntu Software Centre and go to the "Installed" tab.

4. Enter "virtualbox guest" into the search bar. Nothing shows.

5. Select the down-arrow and choose any item, e.g. "Canonical Partners", "Unknown".

6. The "thinking" circle (sorry, I don't know its name) in the window turns around and around, and nothing else happens even when leaving for several minutes. It should display either nothing or the installed package. You can, however, choose a different option in Ubuntu Software Centre, so it has not actually hung.