Try patch at https://bugzilla.gnome.org/show_bug.cgi?id=696756#c3
It works to remove this message in evolution 3.6.4: (evolution:25937): Gdk-CRITICAL **: gdk_device_get_source: assertion `GDK_IS_DEVICE (device)' failed ** Bug watch added: GNOME Bug Tracker #696756 https://bugzilla.gnome.org/show_bug.cgi?id=696756 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gedit in Ubuntu. https://bugs.launchpad.net/bugs/986872 Title: Gdk-CRITICAL **: gdk_device_grab: assertion `GDK_IS_DEVICE (device)' failed Status in “gedit” package in Ubuntu: Confirmed Bug description: Precise i386 logged as gnome-classic Using gedit to modify an existing file then selecting " save as " to set a new file name, and get: (gedit:3377): Gtk-CRITICAL **: gtk_device_grab_add: assertion `GDK_IS_DEVICE (device)' failed (gedit:3377): Gdk-CRITICAL **: gdk_device_grab: assertion `GDK_IS_DEVICE (device)' failed The new file is created but got this error. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: gedit 3.4.1-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-23.37~pre201204170400-generic-pae 3.2.15 Uname: Linux 3.2.0-23-generic-pae i686 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu6 Architecture: i386 Date: Sun Apr 22 16:21:31 2012 ExecutablePath: /usr/bin/gedit SourcePackage: gedit UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gedit/+bug/986872/+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