How to re-enable update notifications in Ubuntu 26.04 LTS

Re-enabling Update Notifications in Ubuntu 26.04 LTS

Background

Ubuntu 26.04 LTS no longer displays update notifications in the system tray after a default installation. This behavior stems from a deliberate design change that disabled the tray icon of the update-notifier package ¹. The package only triggers a desktop notification when its tray icon is visible; if the icon is hidden, no notification is shown either ².

The visibility of the tray icon is controlled by the GSettings key show-updates-status-icon in the com.ubuntu.update-notifier schema. In a fresh installation of Ubuntu 26.04 LTS, this key is set to false by default, which hides the icon and prevents the system from alerting users to available updates ³.

Additionally, globally disabling notification badges—for example, via the command gsettings set org.gnome.shell.extensions.appindicator show-indicators false or a corresponding GNOME setting—can result in update notifications failing to appear even if the key is enabled.

Re-enabling via the Command Line

The quickest way to restore the tray icon and its notifications is to explicitly set the GSettings key to true:

gsettings set com.ubuntu.update-notifier show-updates-status-icon true

After running this command, the update-notifier program must be restarted for the change to take effect. This can be done by logging out and back in or directly via:

killall update-notifier && update-notifier &

The tray icon will then reappear in the top-right panel. Once updates are available, the icon will display a badge, and a desktop notification will be shown—provided the global badge feature is not disabled ²³.

Re-enabling via the Graphical Interface

For users who prefer a graphical approach, the same setting can be adjusted using the Software & Updates tool:

1. Open Software & Updates (e.g., via the application menu or by running software-properties-gtk in a terminal).
2. Navigate to the Updates tab.
3. Check the box labeled "Notify me of available updates" (the exact wording may vary slightly depending on the language).
4. Close the window. The change will take effect immediately or after the next login.

Internally, this checkbox sets the same GSettings key show-updates-status-icon to true, causing the tray icon to reload and display both a badge and a pop-up notification when updates are available ⁴.

Checking the Global Badge Setting

If notifications still fail to appear after enabling the key, verify whether the global badge feature is disabled. The current state can be checked with:

gsettings get org.gnome.shell.extensions.appindicator show-indicators

A return value of false means all application indicators—including the update-notifier icon—will not display badges. To re-enable this feature, run:

gsettings set org.gnome.shell.extensions.appindicator show-indicators true

or adjust the setting via GNOME extension preferences.

Open Questions and Further Considerations

The available sources clearly document how to re-enable the tray icon and its associated notifications in Ubuntu 26.04 LTS. However, several unanswered questions remain:

• Flavor-Specific Behavior: It is unclear whether the tray icon’s deactivation applies only to the default Ubuntu GNOME session or if official flavors like Kubuntu, Xubuntu, Lubuntu, or Ubuntu MATE follow the same behavior.
• Upgrade Behavior: The sources only describe the default value for fresh installations. It is unknown whether upgrading from, say, 24.04 LTS to 26.04 LTS automatically sets the key to false or preserves the user’s previous setting.
• Potential Bugs or Regressions: No concrete bug reports indicate whether certain GNOME extensions, Snap packages, or other components might interfere with re-enabling the icon.
• Notification Format: While it is confirmed that desktop notifications are only sent when the tray icon is visible, it remains unclear whether these notifications appear solely as icon badges or also as standalone pop-ups, as in earlier Ubuntu versions.
• Long-Term Stability of the Setting: There is no information on whether the gsettings configuration persists across future updates of the update-notifier package or could be reset.

These points would be relevant for a comprehensive analysis but fall outside the scope of the currently available sources.

Conclusion

Ubuntu 26.04 LTS suppresses update notifications by default, setting the update-notifier package’s tray icon to false via the GSettings key show-updates-status-icon. Notifications can be re-enabled either via the command line or the graphical "Software & Updates → Updates" interface by setting the key to true. Once restored, the tray icon reappears, displaying a badge and a desktop notification when updates are available—unless the global badge feature is disabled. Further aspects, such as flavor-specific behavior, upgrade implications, potential bugs, or the exact appearance of notifications, remain unanswered based on the provided sources.