It appears I can reproduce the message by changing wallpapers.
Maybe your system is set to automatically change wallpaper every 10
minutes or so, so you will keep getting the message.
** Changed in: gnome-shell (Ubuntu)
Status: Incomplete => New
** Changed in: gnome-shell (Ubuntu)
Importance: Undecided => Low
** Changed in: gnome-shell (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1787822
Title:
gnome-shell[2503]: Object Meta.Background (0x561c9af53600), has been
already deallocated - impossible to access to it
Status in gnome-shell package in Ubuntu:
Triaged
Bug description:
lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04
apt-cache policy gnome-shell
gnome-shell:
Installed: 3.28.2-0ubuntu0.18.04.1
Candidate: 3.28.2-0ubuntu0.18.04.1
Version table:
*** 3.28.2-0ubuntu0.18.04.1 500
Since upgrading from 16.04.5LTS to 18.04.1LTS last Thursday my syslog
has been filling with the below:
Aug 19 11:34:11 localhost gnome-shell[2503]: Object Meta.Background
(0x7febd401a470), has been already deallocated - impossible to access to it.
This might be caused by the fact that the object has been destroyed from C code
using something such as destroy(), dispose(), or remove() vfuncs
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: == Stack trace for
context 0x561c9a54e330 ==
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #0 0x561c9a9edbd8 i
resource:///org/gnome/shell/ui/background.js:718 (0x7febd000f450 @ 22)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #1 0x561c9a9edb50 i
resource:///org/gnome/shell/ui/tweener.js:113 (0x7febd02c7e68 @ 37)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #2 0x7fff0e3e36e0 b
resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7febd02d3b38 @ 54)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #3 0x7fff0e3e3830 b
resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7febd02d3bc0 @
1626)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #4 0x7fff0e3e38e0 b
resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7febd02d3c48 @ 100)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #5 0x7fff0e3e3970 b
resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7febd02d3cd0 @ 10)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #6 0x7fff0e3e3a60 b
resource:///org/gnome/gjs/modules/signals.js:128 (0x7febd02d3230 @ 386)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #7 0x7fff0e3e3b10 b
resource:///org/gnome/shell/ui/tweener.js:245 (0x7febd02cf808 @ 159)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #8 0x7fff0e3e3be0 b
resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7febd02b5de0 @ 71)
Aug 19 11:34:11 localhost org.gnome.Shell.desktop[2503]: #9 0x7fff0e3e3c80 b
resource:///org/gnome/shell/ui/tweener.js:220 (0x7febd02cf780 @ 15)
Following suggestions in previous bug reports about this I went
through and removed all of my shell extensions:
chris@localhost:~/.local/share/gnome-shell/extensions$ ls -l
total 0
chris@localhost:~/.local/share/gnome-shell/extensions$
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2014-10-24 (1395 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
Package: gnome-shell 3.28.2-0ubuntu0.18.04.1
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-32-generic x86_64
UpgradeStatus: Upgraded to bionic on 2018-08-17 (3 days ago)
UserGroups: adm cdrom dip kvm libvirt libvirtd lpadmin netdev plugdev
sambashare sudo
_MarkForUpload: True
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