nixos/iso-image: make graphical grub configurable

1 files changed, 11 insertions, 1 deletions

diff --git a/nixos/modules/installer/cd-dvd/iso-image.nix b/nixos/modules/installer/cd-dvd/iso-image.nix
index f9cbafc2865..5fdee20f55b 100644
--- a/nixos/modules/installer/cd-dvd/iso-image.nix
+++ b/nixos/modules/installer/cd-dvd/iso-image.nix
@@ -283,7 +283,7 @@ let
     cat <<EOF > $out/EFI/boot/grub.cfg
 
     set with_fonts=false
-    set textmode=false
+    set textmode=${boolToString !config.isoImage.graphicalGrub}
     # If you want to use serial for "terminal_*" commands, you need to set one up:
     #   Example manual configuration:
     #    → serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
@@ -658,6 +658,16 @@ in
       '';
     };
 
+    isoImage.graphicalGrub = mkOption {
+      default = false;
+      type = types.bool;
+      example = true;
+      description = lib.mdDoc ''
+        Whether to use textmode or graphical grub.
+        false means we use textmode grub.
+      '';
+    };
+
   };
 
   # store them in lib so we can mkImageMediaOverride the