fix display of install progress in footer

subiquity/controllers/installprogress.py

@@ -110,7 +110,7 @@ class InstallProgressController(BaseController):
             return
         if event_type == 'start':
             message = event.get("CURTIN_MESSAGE", "??")
-            if self.progress_view_showing is not None:
+            if not self.progress_view_showing:
                 self.footer_description.set_text(message)
             self.progress_view.add_event(self._event_indent + message)
             self._event_indent += "  "
@@ -173,6 +173,7 @@ class InstallProgressController(BaseController):
         self.progress_view = ProgressView(self)
         self.footer_spinner = self.progress_view.spinner
 
+        self.ui.auto_footer = False
         self.ui.set_footer(urwid.Columns(
             [('pack', urwid.Text(_("Install in progress:"))),
              (self.footer_description),

subiquitycore/ui/frame.py

@@ -39,6 +39,9 @@ class SubiquityUI(WidgetWrap):
             header=self.header, footer=self.footer)
         self.progress_current = 0
         self.progress_completion = 0
+        # After the install starts, we want to stop setting the footer
+        # from the body view.
+        self.auto_footer = True
         super().__init__(Color.body(self.frame))
 
     def keypress(self, size, key):
@@ -54,4 +57,5 @@ class SubiquityUI(WidgetWrap):
     def set_body(self, widget):
         self.set_header(_(widget.title))
         self.frame.body = widget
-        self.set_footer(_(widget.footer))
+        if self.auto_footer:
+            self.set_footer(_(widget.footer))