Could you include your journalctl log from the session having the issue?
** Changed in: gnome-control-center (Ubuntu)
Importance: Undecided => Low
** Changed in: gnome-control-center (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1807076
Title:
gnome-control-center doesn't start
Status in gnome-control-center package in Ubuntu:
Incomplete
Bug description:
gnome-control-center doesn't start. There is no crash, core dump, etc.
This bit in syslog (/var/log/syslog) gives us some information:
gnome-control-c[2962]: invalid unclassed pointer in cast to 'GtkWindow'
gnome-control-c[2962]: gtk_window_present_with_time: assertion 'GTK_IS_WINDOW
(window)' failed
Actually something similar has been seen already in the past but it
hasn't been resolved:
https://bugs.launchpad.net/ubuntu/+source/gnome-control-
center/+bug/1745846
I might not be the only person affected:
https://askubuntu.com/questions/1094442/gnome-control-center-
disappears-on-ubuntu-18-10-after-repostioning-ubuntu-
dock/1098815#1098815
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.2
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: GNOME-Flashback:GNOME
Date: Thu Dec 6 11:08:42 2018
InstallationDate: Installed on 2018-11-26 (9 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
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