diff -Naur lightdm-1.24.0.orig/liblightdm-gobject/power.c lightdm-1.24.0/liblightdm-gobject/power.c
--- lightdm-1.24.0.orig/liblightdm-gobject/power.c	2017-01-11 17:56:40.000000000 -0600
+++ lightdm-1.24.0/liblightdm-gobject/power.c	2017-11-17 00:29:08.309006419 -0600
@@ -140,8 +140,8 @@
     if (!r)
     {
         r = ck_call_function ("CanSuspend", NULL, NULL);
-        if (r && g_variant_is_of_type (r, G_VARIANT_TYPE ("(b)")))
-            g_variant_get (r, "(b)", &can_suspend);
+        if (r && g_variant_is_of_type (r, G_VARIANT_TYPE ("(s)")))
+            g_variant_get (r, "(s)", &can_suspend);
     }
     if (!r)
     {
@@ -218,8 +218,8 @@
     if (!r)
     {
         r = ck_call_function ("CanHibernate", NULL, NULL);
-        if (r && g_variant_is_of_type (r, G_VARIANT_TYPE ("(b)")))
-            g_variant_get (r, "(b)", &can_hibernate);
+        if (r && g_variant_is_of_type (r, G_VARIANT_TYPE ("(s)")))
+            g_variant_get (r, "(s)", &can_hibernate);
     }
     if (!r)
     {