If I change the volume, the display freezes right after the volume display floating indictor appears in the middle of the screen. I have to either reboot or switch to virtual terminal and killall -3 gnome-shell to restart the session.
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: gnome-shell 3.31.90-1ubuntu1
ProcVersionSignature: Ubuntu 4.19.0-13.14-generic 4.19.20
Uname: Linux 4.19.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu21
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Feb 25 13:20:49 2019
DisplayManager: gdm3
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-06-19 (615 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170617)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to disco on 2019-01-31 (24 days ago)
modified.conffile..etc.default.apport: [modified]
mtime.conffile..etc.default.apport: 2019-02-23T10:27:39.206420
Please, can you attach the journal for gnome-shell?