--- a/data/pam/lightdm	2018-04-29 21:13:23.633200880 +0300
+++ b/data/pam/lightdm	2018-04-29 21:14:24.817767352 +0300
@@ -7,7 +7,7 @@
 auth      required pam_env.so
 
 # Use /etc/passwd and /etc/shadow for passwords
-auth      required pam_unix.so
+auth      required pam_unix.so nullok
 
 # Check account is active, change password if required
 account   required pam_unix.so