gnome-applets_3.36.2-1: window-picker applet fails to free items when window moved between monitors

Bug #1879140 reported by Sebastian Geiger on 2020-05-17
This bug affects 1 person
Affects Status Importance Assigned to Milestone
GNOME Applets
gnome-applets (Ubuntu)

Bug Description


There is a bug in the window-picker applet that prevents task items from being correctly freed when multiple window-picker applets exist on different monitors and windows are moved to another monitor before being closed. After several windows have been opened and closed, the window picker applet will fill up with icons from non longer existing windows. These icons can be clicked, but since the corresponding window has been closed the click has no effect.

Upstream fix:

Backported fix for Gnome Applets 3.36:

[Test Case]

To test this issue a multi-monitor setup with two monitors required. Ensure that on each monitor there is a gnome-panel and each panel has a window-picker applet added to it.

1. Open a window on one monitor.
2. Move the window to the other monitor.
3. Close the window.
4. The icon for the closed window will remain visible on the window-picker applet of the second monitor.

It may help to repeat these steps several times and open and close to different other windows.

[Regression Potential]

The regression potential is minimal. The code for the signal handlers already existed in the current versions. The change only ensures that the callbacks are reconnected to the correct object.

affects: gnome-flashback (Ubuntu) → gnome-applets (Ubuntu)
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package gnome-applets - 3.36.4-1

gnome-applets (3.36.4-1) unstable; urgency=medium

  * New upstream release.
    - Fixes window-picker issues when a window is moved between monitors
      (LP: #1879140).
  * Drop the netspeed patch, included in the new release.
  * Add a comment that our --as-needed overrides upstream --no-as-needed
    (coming from m4/ax_compiler_flags_ldflags.m4), to fix Lintian warning.
  * Update to debhelper compat level 13.
    - Drop dh_missing override, --fail-missing is now the default.

 -- Dmitry Shachnev <email address hidden> Sat, 23 May 2020 19:15:26 +0300

Changed in gnome-applets (Ubuntu):
status: New → Fix Released

Hello Sebastian, or anyone else affected,

Accepted gnome-applets into focal-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in gnome-applets (Ubuntu Focal):
status: New → Fix Committed
tags: added: verification-needed verification-needed-focal
Sebastian Geiger (lanoxx) wrote :

I can confirm that the bug is fixed with version 3.36.4-0ubuntu1 which is currently in proposed.

tags: added: verification-done verification-done-focal
removed: verification-needed verification-needed-focal
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