Public bug reported: I found this 20+ times in .xsession-errors after leaving the screensaver running overnight.
(gnome-screensaver:5633): Gtk-CRITICAL **: gtk_widget_set_visible: assertion `GTK_IS_WIDGET (widget)' failed ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: gnome-screensaver 3.6.1-0ubuntu3 ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6 Uname: Linux 3.8.0-30-generic x86_64 ApportVersion: 2.9.2-0ubuntu8.3 Architecture: amd64 Date: Sat Sep 7 08:24:38 2013 GnomeSessionIdleInhibited: No GnomeSessionInhibitors: None GsettingsGnomeSession: org.gnome.desktop.session idle-delay uint32 600 org.gnome.desktop.session session-name 'ubuntu' InstallationDate: Installed on 2013-08-31 (6 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: True SourcePackage: gnome-screensaver UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: gnome-screensaver (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug raring -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1222137 Title: gnome-screensaver emits repeated error, gtk_widget_set_visible: assertion `GTK_IS_WIDGET (widget)' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1222137/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs