anyway i got my navit working using the internal gui with gtk_drawing_area. work pretty good even if in the terminal i can see some errors like:

navit:displayitem_draw:failed to load icon '/opt/navit/share/navit/xpm/parking.xpm' also for other icons like worship heliport viewpoint zoo etc.

and i choose an osd.xml that at least make visible the zoom in/out icons and the fullscreen icon, but there is still a square with an interrogative point inside, i don't know what icon should be

if somebody know how to fix the error with qt_qpainter please let me know!

that is:
navit: plugin_load:can't load '/opt/navit/lib/navit/graphics/libgraphics_qt_qpainter.so', Error '/opt/navit/lib/navit/graphics/libgraphics_qt_qpainter.so: undefined symbol: _ZTV14EmbeddedWidget'
navit: plugin_load:can't load '/opt/navit/lib/navit/osd/libosd_core.so', already loaded

i don't know if there is a conflict with some other qt apps that i have installed on the phone or what