I forgot to reply to the question about Gnome Shell extensions. No, I have not installed any. The only ones I have are ones that were installed as part of 19.04:
dpkg -l | grep -i gnome-shell ii gnome-shell 3.32.0+git20190410-1ubuntu1 amd64 graphical shell for the GNOME desktop ii gnome-shell-common 3.32.0+git20190410-1ubuntu1 all common files for the GNOME graphical shell ii gnome-shell-extension-appindicator 28-1 all AppIndicator/KStatusNotifierItem support for GNOME Shell ii gnome-shell-extension-desktop-icons 19.01.1-1 all desktop icon support for GNOME Shell ii gnome-shell-extension-ubuntu-dock 64ubuntu7 all Ubuntu Dock for GNOME Shell ii yaru-theme-gnome-shell 19.04.2 all Yaru GNOME Shell desktop theme from the Ubuntu Community -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1827791 Title: Dell XPS 13 9380 - Screen and input freezes / hangs temporarily To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1827791/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs