services: enable displaymanager via globalstorage

src/modules/services/main.py

@@ -67,5 +67,16 @@ def run():
             else:
                 libcalamares.utils.debug("Cannot disable systemd service {}".format(dbl['name']))
                 libcalamares.utils.debug("systemctl disable call in chroot returned error code {}".format(ec))
+    
+    if libcalamares.globalstorage.contains("displayManagers"):
+        for dm in libcalamares.globalstorage.value("displayManagers"):
+            ec = libcalamares.utils.target_env_call(['systemctl', 'enable', '{}.service'.format(dm)])
+    
+            if ec != 0:
+                return "Cannot enable systemd service {}".format(dm), \
+                    "systemctl enable call in chroot returned error code {}".format(ec)
+            else:
+                libcalamares.utils.debug("Cannot enable systemd service {}".format(dm))
+                libcalamares.utils.debug("systemctl enable call in chroot returned error code {}".format(ec))
 
     return None