From 06037474e6f5195135cf0051df0bf198ebc80c48 Mon Sep 17 00:00:00 2001
From: longpanda <support@iventoy.com>
Date: Mon, 12 Oct 2026 14:39:52 +0800
Subject: [PATCH] Fix the grub2 mode regression introduced in 1.1.18 (#3772)

---
 GRUB2/MOD_SRC/grub-2.04/grub-core/kern/env.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/GRUB2/MOD_SRC/grub-2.04/grub-core/kern/env.c b/GRUB2/MOD_SRC/grub-2.04/grub-core/kern/env.c
index e008204f..13722e83 100644
--- a/GRUB2/MOD_SRC/grub-2.04/grub-core/kern/env.c
+++ b/GRUB2/MOD_SRC/grub-2.04/grub-core/kern/env.c
@@ -149,6 +149,10 @@ grub_env_get (const char *name)
   if (var->read_hook)
     return var->read_hook (var, var->value);
 
+  /* theme var hook will cause them return '' after unset */
+  if (var->value && var->value[0] == 0 && grub_strcmp(name, "theme") == 0)
+    return 0;
+
   return var->value;
 }