diff -up mutter-3.26.0/src/backends/native/meta-launcher.c.hybrid mutter-3.26.0/src/backends/native/meta-launcher.c

--- mutter-3.26.0/src/backends/native/meta-launcher.c.hybrid	2017-09-18 15:55:56.673262947 +0100

+++ mutter-3.26.0/src/backends/native/meta-launcher.c	2017-09-18 15:56:21.383167768 +0100

@@ -363,7 +363,7 @@ get_primary_gpu_path (const gchar *seat_

       guint num_devices;

       num_devices = count_devices_with_connectors (seat_name, devices);

-      if (num_devices != 1)

+      if (num_devices > 1)

         goto out;

     }