Judging by your screenshot, this is a bug in Ubuntu Dock. It has nothing to do with GDM at all.
Also if you'd like to discuss Thunderbird then please open a separate new bug. ** Package changed: gdm3 (Ubuntu) => gnome-shell-extension-ubuntu-dock (Ubuntu) ** Summary changed: - gdm "New Window" popup won't go away + Ubuntu Dock popup menu won't go away ** Description changed: Every so often, typically when I'm using Thunderbird, I attempt to use - GDM to create a new window or something like that, and the "New Window" - popup comes up, but does not work. Attempts to click on it have no - effect. I cannot make the popup go away, other than by logging out and - logging back in again (or rebooting). + the dock context menu to create a new window or something like that, and + the "New Window" popup comes up, but does not work. Attempts to click on + it have no effect. I cannot make the popup go away, other than by + logging out and logging back in again (or rebooting). I did not observe this problem until I installed Ubuntu 21.04, so I expect it's a glitch that is new to this release. See attached screenshot for an example of the popup that won't go away. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: gdm3 3.38.2.1-2ubuntu1 ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21 Uname: Linux 5.11.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Wed Jun 30 10:57:22 2021 InstallationDate: Installed on 2018-08-03 (1062 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: gdm3 UpgradeStatus: Upgraded to hirsute on 2021-06-03 (26 days ago) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. https://bugs.launchpad.net/bugs/1934185 Title: Ubuntu Dock popup menu won't go away Status in gnome-shell-extension-ubuntu-dock package in Ubuntu: New Bug description: Every so often, typically when I'm using Thunderbird, I attempt to use the dock context menu to create a new window or something like that, and the "New Window" popup comes up, but does not work. Attempts to click on it have no effect. I cannot make the popup go away, other than by logging out and logging back in again (or rebooting). I did not observe this problem until I installed Ubuntu 21.04, so I expect it's a glitch that is new to this release. See attached screenshot for an example of the popup that won't go away. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: gdm3 3.38.2.1-2ubuntu1 ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21 Uname: Linux 5.11.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Wed Jun 30 10:57:22 2021 InstallationDate: Installed on 2018-08-03 (1062 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: gdm3 UpgradeStatus: Upgraded to hirsute on 2021-06-03 (26 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1934185/+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
