Comment 0 for bug 1853331

nm-applet is logging a continuous stream of:

Nov 20 15:42:54 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:42:54 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:42:54 X1 nm-applet[3092]: Can't set a parent on widget which has a parent
Nov 20 15:44:54 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:44:54 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:44:54 X1 nm-applet[3092]: Can't set a parent on widget which has a parent
Nov 20 15:45:55 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:45:55 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:45:55 X1 nm-applet[3092]: Can't set a parent on widget which has a parent
Nov 20 15:46:40 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:40 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:40 X1 nm-applet[3092]: Can't set a parent on widget which has a parent
Nov 20 15:46:40 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:40 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:40 X1 nm-applet[3092]: Can't set a parent on widget which has a parent
Nov 20 15:46:55 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:55 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:55 X1 nm-applet[3092]: Can't set a parent on widget which has a parent
Nov 20 15:46:55 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:55 X1 nm-applet[3092]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Nov 20 15:46:55 X1 nm-applet[3092]: Can't set a parent on widget which has a parent

System updated on 19 Nov 2019

 lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.3 LTS
Release: 18.04
Codename: bionic

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: network-manager-gnome 1.8.10-2ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-70.79-generic 4.15.18
Uname: Linux 4.15.0-70-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
Date: Wed Nov 20 15:48:21 2019
InstallationDate: Installed on 2018-11-06 (379 days ago)
InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
IpRoute:
 default via 192.168.178.1 dev enx3c18a0095fb1 proto dhcp metric 100
 default via 192.168.178.1 dev wlp4s0 proto dhcp metric 600
 192.168.178.0/24 dev enx3c18a0095fb1 proto kernel scope link src 192.168.178.24 metric 100
 192.168.178.0/24 dev wlp4s0 proto kernel scope link src 192.168.178.29 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: network-manager-applet
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.10.14 connected started full enabled enabled enabled enabled enabled