nixos/display-managers/auto: remove

This module allows root autoLogin, so we would break that for users, but
they shouldn't be using it anyways. This gives the impression like auto
is some special display manager, when it's just lightdm and special pam
rules to allow root autoLogin. It was created for NixOS's testing
so I believe this is where it belongs.

1 files changed, 7 insertions, 0 deletions

diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index 26de8a18d922..dbe687d8e22f 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -34,6 +34,13 @@ with lib;
       as the underlying package isn't being maintained. Working alternatives are
       libinput and synaptics.
     '')
+    (mkRemovedOptionModule [ "services" "xserver" "displayManager" "auto" ] ''
+      The services.xserver.displayManager.auto module has been removed
+      because it was only intended for use in internal NixOS tests, and gave the
+      false impression of it being a special display manager when it's actually
+      LightDM. Please use the services.xserver.displayManager.lightdm.autoLogin options
+      instead, or any other display manager in NixOS as they all support auto-login.
+    '')
 
     # Do NOT add any option renames here, see top of the file
   ];