That's probably bug #1814949, opening another panel, e.G by using $ gnome-control-center display could workaround the issue
Could you also get a backtrace using gdb (https://wiki.ubuntu.com/Backtrace) ** Changed in: gnome-control-center (Ubuntu) Importance: Undecided => High ** Changed in: gnome-control-center (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1815723 Title: Segmentation fault (core dumped) Status in gnome-control-center package in Ubuntu: Incomplete Bug description: Segmentation fault (core dumped) after upgrading to 3.31.90 ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: gnome-control-center 1:3.31.90-1ubuntu1 ProcVersionSignature: Ubuntu 4.19.0-12.13-generic 4.19.18 Uname: Linux 4.19.0-12-generic x86_64 ApportVersion: 2.20.10-0ubuntu20 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Feb 13 11:29:40 2019 InstallationDate: Installed on 2018-02-15 (362 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180214) SourcePackage: gnome-control-center UpgradeStatus: Upgraded to disco on 2018-10-20 (116 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1815723/+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
