gnome-shell stops allowing interactions

[fcole90]

From time to time gnome-shell gets unresponsive to inputs. I can move the cursor, but I cannot interact with the shell in any way, neither with mouse or keyboard.

When this happens I move to a vt and restart the shell with `killall -3 gnome-shell`. After this the shell does usually resume working (albeit some application crashes in the process from time to time).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.34.1+git20191024-1ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
ApportVersion: 2.20.11-0ubuntu9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Nov 5 15:31:55 2019
DisplayManager: gdm3
InstallationDate: Installed on 2019-02-03 (274 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
RelatedPackageVersions: mutter-common 3.34.1+git20191022-2ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to focal on 2019-07-21 (106 days ago)