=== modified file 'ubiquity/frontend/gtk_ui.py'
--- ubiquity/frontend/gtk_ui.py	2017-09-28 21:25:09 +0000
+++ ubiquity/frontend/gtk_ui.py	2017-10-12 16:32:48 +0000
@@ -158,6 +158,11 @@
     def switch_to_install_interface(self):
         self._wizard.switch_to_install_interface()
 
+def on_a11y_changed(gsettings, key):
+    if key == "screen-reader-enabled":
+        if gsettings.get_value(key).unpack() == True:
+            if osextras.find_on_path('onboard'):
+                subprocess.Popen(['onboard'], preexec_fn=misc.drop_all_privileges)
 
 class Wizard(BaseFrontend):
     def __init__(self, distro):
@@ -369,6 +374,9 @@
                 ['canberra-gtk-play', '--id=system-ready'],
                 preexec_fn=misc.drop_all_privileges)
 
+        settings_a11y = Gio.Settings.new("org.gnome.desktop.a11y.applications")
+        settings_a11y.connect("changed", on_a11y_changed)
+
     def all_children(self, parent):
         if isinstance(parent, Gtk.Container):
             def recurse(x, y):