Merge branch 'staging-next' into staging

nixos/modules/services/x11/display-managers/gdm.nix

@@ -264,7 +264,7 @@ in
     # presented and there's a little delay.
     environment.etc."gdm/custom.conf".text = ''
       [daemon]
-      WaylandEnable=${if cfg.gdm.wayland then "true" else "false"}
+      WaylandEnable=${boolToString cfg.gdm.wayland}
       ${optionalString cfg.autoLogin.enable (
         if cfg.gdm.autoLogin.delay > 0 then ''
           TimedLoginEnable=true

nixos/modules/services/x11/display-managers/lightdm.nix

@@ -308,6 +308,7 @@ in
       home = "/var/lib/lightdm";
       group = "lightdm";
       uid = config.ids.uids.lightdm;
+      shell = pkgs.bash;
     };
 
     systemd.tmpfiles.rules = [

nixos/modules/services/x11/display-managers/sddm.nix

@@ -55,10 +55,10 @@ let
     XauthPath=${pkgs.xorg.xauth}/bin/xauth
     DisplayCommand=${Xsetup}
     DisplayStopCommand=${Xstop}
-    EnableHidpi=${if cfg.enableHidpi then "true" else "false"}
+    EnableHidpi=${boolToString cfg.enableHidpi}
 
     [Wayland]
-    EnableHidpi=${if cfg.enableHidpi then "true" else "false"}
+    EnableHidpi=${boolToString cfg.enableHidpi}
     SessionDir=${dmcfg.sessionData.desktops}/share/wayland-sessions
 
     ${optionalString dmcfg.autoLogin.enable ''