Eu uso (L) o Ubuntu Zesty. Se eu chamar o evince myfile.pdf , recebo alguns avisos antes que o aplicativo apareça:
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:23:18: not a number
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:23:18: Expected a string.
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:815:10: not a number
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:815:24: Using Pango syntax for the font: style property is deprecated; please use CSS syntax
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1953:14: not a number
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1953:14: Expected a string.
(evince:11529): Gtk-WARNING **: Theme parsing error: nautilus.css:50:71: Using one color stop with linear-gradient() is deprecated.
(evince:11529): Gtk-WARNING **: Theme parsing error: nautilus.css:51:71: Using one color stop with linear-gradient() is deprecated.
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-lubuntu.css:252:14: not a number
(evince:11529): Gtk-WARNING **: Theme parsing error: gtk-lubuntu.css:252:14: Expected a string.
(evince:11529): Gtk-WARNING **: Allocating size to EvSidebar 0x55d3ce38f6a0 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate?
Então, com o último erro, estou supondo que é impossível, já que não vou começar a mexer no código do aplicativo. Mas posso ajustar os arquivos CSS mencionados para evitar os avisos? Se sim, como? Eu não entendo muito bem esses avisos.