gdm "New Window" popup won't go away

[Paul Eggert]

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).

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)

[Paul Eggert (eggert-cs)]

Although I filed this bug once, using "ubuntu-bug", somehow it showed up on Launchpad twice, as bug#1934185 and bug#1934186. I attempted to mark the latter as a duplicate of the former, and the web interface seemed to work at first but now I don't see any record that it's a duplicate. I will follow up via the earlier bug number.

[Hans Joachim Desserud (hjd)]

>Although I filed this bug once, using "ubuntu-bug", somehow it showed up on Launchpad twice,

Unfortunatly that happens occasionally. Should be marked as a duplicate now. :)

Btw, if you add a space between bug and # it will add an automatic link, like this: bug #1934185