[Bug 1796031] [NEW] Panel listing packages empty, but upgrades are available

[Benjamin Bach]

Public bug reported:

I have 23 upgrades available, but they don't display in update-notifier.
See attached screenshot.

See attached screenshot.

Behavior is reproducible.

These are the upgrades that are available:

~ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  linux-headers-4.15.0-33 linux-headers-4.15.0-33-generic
  linux-image-4.15.0-33-generic linux-modules-4.15.0-33-generic
  linux-modules-extra-4.15.0-33-generic
Use 'sudo apt autoremove' to remove them.
The following packages have been kept back:
  nodejs
The following packages will be upgraded:
  firefox firefox-locale-en gir1.2-javascriptcoregtk-4.0 gir1.2-webkit2-4.0
  libbrotli1 libjavascriptcoregtk-4.0-18 liblouis-data liblouis14
  libnautilus-extension1a libplymouth4 libwebkit2gtk-4.0-37 libwoff1 nautilus
  nautilus-data plymouth plymouth-label plymouth-theme-ubuntu-logo
  plymouth-theme-ubuntu-text python3-louis python3-update-manager
  slack-desktop update-manager update-manager-core
23 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 119 MB of archives.
After this operation, 2,797 kB of additional disk space will be used.
Do you want to continue? [Y/n]

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

** Attachment added: "Screenshot of empty notifier panel"
   https://bugs.launchpad.net/bugs/1796031/+attachment/5196941/+files/Screenshot%20from%202018-10-04%2009-32-42.png

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-notifier in Ubuntu.
https://bugs.launchpad.net/bugs/1796031

Title:
  Panel listing packages empty, but upgrades are available

Status in update-notifier package in Ubuntu:
  New

Bug description:
  I have 23 upgrades available, but they don't display in update-
  notifier. See attached screenshot.

  See attached screenshot.

  Behavior is reproducible.

  These are the upgrades that are available:

  ~ sudo apt upgrade
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Calculating upgrade... Done
  The following packages were automatically installed and are no longer required:
    linux-headers-4.15.0-33 linux-headers-4.15.0-33-generic
    linux-image-4.15.0-33-generic linux-modules-4.15.0-33-generic
    linux-modules-extra-4.15.0-33-generic
  Use 'sudo apt autoremove' to remove them.
  The following packages have been kept back:
    nodejs
  The following packages will be upgraded:
    firefox firefox-locale-en gir1.2-javascriptcoregtk-4.0 gir1.2-webkit2-4.0
    libbrotli1 libjavascriptcoregtk-4.0-18 liblouis-data liblouis14
    libnautilus-extension1a libplymouth4 libwebkit2gtk-4.0-37 libwoff1 nautilus
    nautilus-data plymouth plymouth-label plymouth-theme-ubuntu-logo
    plymouth-theme-ubuntu-text python3-louis python3-update-manager
    slack-desktop update-manager update-manager-core
  23 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
  Need to get 119 MB of archives.
  After this operation, 2,797 kB of additional disk space will be used.
  Do you want to continue? [Y/n]

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1796031/+subscriptions