Improve Fatal error handling an messages

screen.py

@@ -16,6 +16,7 @@ from gi.repository import Gtk, Gdk, GLib, Pango
 from importlib import import_module
 from jinja2 import Environment
 from signal import SIGTERM
+from sys import exit
 
 from ks_includes import functions
 from ks_includes.KlippyWebsocket import KlippyWebsocket
@@ -87,6 +88,11 @@ class KlipperScreen(Gtk.Window):
     max_retries = 4
 
     def __init__(self, args, version):
+        try:
+            super().__init__(title="KlipperScreen")
+        except Exception as e:
+            logging.exception(e)
+            raise RuntimeError from e
         self.blanking_time = 600
         self.use_dpms = True
         self.apiclient = None
@@ -99,10 +105,10 @@ class KlipperScreen(Gtk.Window):
         self._config = KlipperScreenConfig(configfile, self)
         self.lang_ltr = set_text_direction(self._config.get_main_config().get("language", None))
 
-        Gtk.Window.__init__(self)
         self.connect("key-press-event", self._key_press_event)
-        self.set_title("KlipperScreen")
         monitor = Gdk.Display.get_default().get_primary_monitor()
+        if monitor is None:
+            raise RuntimeError("Couldn't get default monitor")
         self.width = self._config.get_main_config().getint("width", monitor.get_geometry().width)
         self.height = self._config.get_main_config().getint("height", monitor.get_geometry().height)
         self.set_default_size(self.width, self.height)
@@ -983,8 +989,14 @@ def main():
     functions.patch_threading_excepthook()
 
     logging.info(f"KlipperScreen version: {version}")
-
+    if not Gtk.init_check(None)[0]:
+        logging.critical("Failed to initialize Gtk")
+        raise RuntimeError
+    try:
         win = KlipperScreen(args, version)
+    except Exception as e:
+        logging.exception("Failed to initialize window")
+        raise RuntimeError from e
     win.connect("destroy", Gtk.main_quit)
     win.show_all()
     Gtk.main()
@@ -995,3 +1007,4 @@ if __name__ == "__main__":
         main()
     except Exception as ex:
         logging.exception(f"Fatal error in main loop:\n{ex}")
+        exit(1)