[Bug 1210213] [NEW] Software Updater fails to show packages that will be updated

[Forest]

Public bug reported:

When I logged in today, update-notifier told me that 6 updates were
available. When I launched update-manager, the Software Updater window
said "388kB will be downloaded", but the "Details of updates" list was
empty.

There obviously were updates to be installed, as confirmed by the output of apt-get:
$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  apport apport-gtk python-apport python-problem-report python3-apport
  python3-problem-report
6 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 388 kB of archives.
After this operation, 1,024 B of additional disk space will be used.
Do you want to continue [Y/n]?

Despite the mysteriously empty Software Updater list, I clicked "Install
Now", and the updates were installed. Still, I think it should have told
me what it intended to install.

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "Screen shot showing the size of updates with nothing in the details list."
   https://bugs.launchpad.net/bugs/1210213/+attachment/3765175/+files/update-manager-nodetails.png

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1210213

Title:
  Software Updater fails to show packages that will be updated

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  When I logged in today, update-notifier told me that 6 updates were
  available. When I launched update-manager, the Software Updater window
  said "388kB will be downloaded", but the "Details of updates" list was
  empty.

  There obviously were updates to be installed, as confirmed by the output of apt-get:
  $ sudo apt-get upgrade
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages will be upgraded:
    apport apport-gtk python-apport python-problem-report python3-apport
    python3-problem-report
  6 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  Need to get 388 kB of archives.
  After this operation, 1,024 B of additional disk space will be used.
  Do you want to continue [Y/n]?

  Despite the mysteriously empty Software Updater list, I clicked
  "Install Now", and the updates were installed. Still, I think it
  should have told me what it intended to install.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1210213/+subscriptions