Ubiquity 2.1.33
/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py:545: GtkWarning: gtk_window_resize: assertion `width > 0' failed
  widget.resize(w, h)
/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py:593: GtkWarning: gtk_cell_layout_set_attributes: assertion `GTK_IS_CELL_RENDERER (cell)' failed
  self.grub_new_device_entry.set_text_column(0)