looking at .xsession-errors i get lots of messages like: (marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn without a current allocation. This should not happen.
(marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn without a current allocation. This should not happen. Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x2600008 () Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd4400. Allocation is 34x24, but minimum required size is 34x34. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd49a0. Allocation is 171x24, but minimum required size is 171x387. (marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn without a current allocation. This should not happen. (marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn without a current allocation. This should not happen. (caja:23056): Gtk-WARNING **: Theme parsing error: <data>:1:51: The style property GtkStatusbar:shadow-type is deprecated and shouldn't be used anymore. It will be removed in a future version (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd4400. Allocation is 34x24, but minimum required size is 34x34. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd47c0. Allocation is 791x24, but minimum required size is 985x24. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate MatePanelAppletFrameDBus's child MatePanelAppletContainer 0x558f149b08e0. Allocation is 781x24, but minimum required size is 975x24. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate MatePanelAppletContainer's child GtkSocket 0x558f14cd5680. Allocation is 781x24, but minimum required size is 975x24. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd49a0. Allocation is 171x24, but minimum required size is 171x387. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd4400. Allocation is 34x24, but minimum required size is 34x34. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd49a0. Allocation is 171x24, but minimum required size is 171x387. (caja:23410): Gtk-WARNING **: Allocating size to GtkTable 0x5598a232a140 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate? ** Message: Initializing gksu extension... Initializing caja-open-terminal extension (caja:23410): Gtk-WARNING **: Allocating size to GtkTable 0x5598a232a140 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate? (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd4400. Allocation is 34x24, but minimum required size is 34x34. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd49a0. Allocation is 171x24, but minimum required size is 171x387. (caja:23410): Gtk-WARNING **: Allocating size to GtkTable 0x5598a232a140 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate? (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd4400. Allocation is 34x24, but minimum required size is 34x34. (mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate PanelWidget's child MatePanelAppletFrameDBus 0x558f14cd49a0. Allocation is 171x24, but minimum required size is 171x387.