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
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