MaikuB/flutter_local_notifications

Changing notification details for a Linux notification doesn't apply immediately unless its old one is deleted first.

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#2595 opened on Apr 3, 2025

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help wanted

Description

Describe the bug

If I create an urgent notification on Linux (Gnome 48), it appears as it should. However if I change the notification details by lowering the urgency, then display the same notification again, the result is that the notification is re-shown with the original urgency.

To Reproduce

  1. Set urgency of notification details to be critical, on Linux
  2. Create urgent notification
  3. Update notification details object with lower priority
  4. Create new notification with the same notification details object
  5. See that the incorrect urgency is applied
  6. Create new notification
  7. See that the desired notification type is now applied on the third notification

Expected behavior

The expectation is that the less urgent method will be used on the second and third notifications.

Sample code to reproduce the problem

Here is the commit I used to work around this issue in my app:

https://github.com/sandpiper-codes/open_alert_viewer/commit/8b2d5bf6e0bca4866fb001e51e58aed993b2c5c5

I decided to conditionally remove the previous notification before showing a new one, but perhaps removing every time would have the same effect.

Contributor guide

Tech stack
flutter
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic knowledge of Flutter notificationsUnderstanding of Linux notification system
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Investigate the Linux implementation of the notification plugin, particularly how notification details are applied when creating a new notification. The workaround in the referenced commit (8b2d5bf6e0bca4866fb001e51e58aed993b2c5c5) suggests deleting the previous notification before showing. Look at the code in the `flutter local notifications linux` package to determine why the urgency is not updated until the second call. Check if the notification object retains the old urgency properties.