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-rw-r--r--nixos/modules/services/x11/display-managers/default.nix3
1 files changed, 3 insertions, 0 deletions
diff --git a/nixos/modules/services/x11/display-managers/default.nix b/nixos/modules/services/x11/display-managers/default.nix
index 3adb50c678e..58e4fe04f37 100644
--- a/nixos/modules/services/x11/display-managers/default.nix
+++ b/nixos/modules/services/x11/display-managers/default.nix
@@ -279,6 +279,9 @@ in
             defaultSessionFromLegacyOptions
           else
             null;
+        defaultText = literalDocBook ''
+          Taken from display manager settings or window manager settings, if either is set.
+        '';
         example = "gnome";
         description = ''
           Graphical session to pre-select in the session chooser (only effective for GDM, LightDM and SDDM).