I'm seeing the same thing after the recent update to Thunderbird 78.11. Ubuntu 21.04 on Wayland. x11 is ok. In my case it appears to be related to the Reminder dialogue opening. Some more details:
Start Thunderbird and make sure the Reminder dialogue does not open (eg by snoozing any reminders in a previous session). Open a few emails in new windows - everything works as normal. Now set a calendar entry for a few minutes and wait for the reminder dialogue to pop up. Icon on dock shows indicator showing two open window Open an email in a new window Icon on dock shows indicator showing three open windows Close email Icon on dock still shows indicator showing three open windows Icon on dock is now unresponsive to left click. Right-click shows the menu listing all the windows you have opened, but is unresponsive and stays on the screen. It goes if you press "Super" twice. Then switch to Thunderbird using Alt-tab Repeat until more than 4 windows have been opened - icon show the maximum 4 indicators. Close Thunderbird using Quit from the menu (ps shows no running Thunderbird processes) Dock still shows icon with 4 indicators Left or right click no longer does anything. A middle-click starts a new instance of Thunderbird. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1932328 Title: Thunderbird under Wayland does not correctly close (or manage) windows Status in thunderbird package in Ubuntu: Confirmed Bug description: Using Ubuntu 21.04 (Hirsute) that starts in Wayland, by default. Thunderbird version: 78.11.0 with "gnome-support" package. Same problem in safe mode. Description: By default in this context, TB is a Wayland task. When opening a compose windows (or reply or transfer), sending mail apparently close the windows, but gnome shell continue to show multiple "points", as if multiple windows are still active. And after closing TB, it seems maintained in the same state, so it becomes impossible to relaunch it from the desk. But task manager of "looking glass" do not show it and it is possible to launch from terminal. Provisional solution: Modify .desktop file to launch with --display=:0 option, that force to use XWayland interface, as shown by xlsclients (for example). But it is actually a bug under Wayland context, that also badly interfer with many add-ons or extensions. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1932328/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
