I did that and it is reported as bug #1835033. When I killed the frozen gnome-shell process, it had recovered by the time I switched back to it and I was then able to close the offending window.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1834984 Title: gnome-shell freezes with 100% CPU when closing popup window Status in gnome-shell package in Ubuntu: Incomplete Bug description: Whenever I run Netbeans 11 (using either openjdk11) and (eg): 1. Open Tools / Plugins. 2. Go to Settings. 3. Click on 'Add'. 4. Click 'Cancel'. then gnome-shell freezes (except for the mouse), apparently indefinitely (I have left it for 30+ minutes.) I can login as another user via CTRL-ALT-F1 and kill the frozen session using loginctl. Sometimes this kills gnome-shell completely and I have to power cycle; other times I can switch back to the login with CTRL-ALT-F1 and continue. This also usually happens when I close any other popup windows in Netbeans. I have tried making the popup windows modal and non-modal, but it makes no difference. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: gnome-shell 3.32.2-2ubuntu1 Uname: Linux 5.2.0-050200rc7-generic x86_64 ApportVersion: 2.20.11-0ubuntu3 Architecture: amd64 Date: Tue Jul 2 11:34:29 2019 DisplayManager: gdm3 GsettingsChanges: InstallationDate: Installed on 2019-07-01 (0 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190606) ProcEnviron: LANGUAGE=en_AU:en TERM=xterm-256color PATH=(custom, no user) LANG=en_AU.UTF-8 SHELL=/bin/bash RelatedPackageVersions: mutter-common 3.32.2+git20190626-1ubuntu1 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1834984/+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
