diff -Nru nvidia-prime-0.8.9/debian/changelog nvidia-prime-0.8.10/debian/changelog
--- nvidia-prime-0.8.9/debian/changelog	2018-07-31 14:47:20.000000000 +0000
+++ nvidia-prime-0.8.10/debian/changelog	2018-10-01 09:06:55.000000000 +0000
@@ -1,3 +1,12 @@
+nvidia-prime (0.8.10) cosmic; urgency=medium
+
+  * prime-switch:
+    - Give udev the time to add the drm device. Fixes a race
+      condition that causes problems when using lightdm and
+      sddm (LP: #1778011).
+
+ -- Alberto Milone <alberto.milone@canonical.com>  Mon, 01 Oct 2018 11:06:55 +0200
+
 nvidia-prime (0.8.9) cosmic; urgency=medium
 
   [ Alberto Milone ]
diff -Nru nvidia-prime-0.8.9/prime-switch nvidia-prime-0.8.10/prime-switch
--- nvidia-prime-0.8.9/prime-switch	2018-06-20 11:47:56.000000000 +0000
+++ nvidia-prime-0.8.10/prime-switch	2018-10-01 09:06:55.000000000 +0000
@@ -19,5 +19,7 @@
 #
 
 # Call the GPU manager
-/usr/bin/gpu-manager --log /var/log/gpu-manager.log
+/usr/bin/gpu-manager --log /var/log/gpu-manager-switch.log
+# Give udev the time to add back the drm device
+udevadm settle --timeout=2
 exit 0