From 1e09daa057006b8a93e83b74f1cfbf7b4e991864 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ruiz=20de=20Alegr=C3=ADa?= <daniel@drasite.com>
Date: Mon, 15 Jun 2020 12:50:22 +0200
Subject: [PATCH] Use same background for grub theme and desktop-base grub
 image

---
 debian/kali-themes.postinst           | 11 +++++++++++
 share/grub/themes/kali/background.png |  1 +
 share/grub/themes/kali/theme.txt      |  2 +-
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 120000 share/grub/themes/kali/background.png

diff --git a/debian/kali-themes.postinst b/debian/kali-themes.postinst
index cee4ae37..94b1fd11 100644
--- a/debian/kali-themes.postinst
+++ b/debian/kali-themes.postinst
@@ -81,6 +81,17 @@ if [ "$1" = "configure" ]; then
     # Copy grub theme to /boot
     mkdir -p /boot/grub/themes/kali
     cp -r /usr/share/grub/themes/kali/* /boot/grub/themes/kali/
+    # Set grub theme background
+    # Use background with 16x9 aspect ratio for efi installations detected
+    # by the presence of grub-efi* packages (not the grub-efi*-bin which don’t
+    # necessary account for grub being the active bootloader).
+    if dpkg-query --list grub-efi* | grep -v "^... grub-efi[^[:space:]]*-bin" | grep -q "^[ih][HUFWti] " ; then
+        echo "grub-efi* packages found, using 16/9 as default grub background ratio"
+        ln -sf /boot/grub/themes/kali/grub-16x9.png /boot/grub/themes/kali/background.png
+    else
+        echo "No grub-efi* package found, using 4/3 as default grub background ratio"
+        ln -sf /boot/grub/themes/kali/grub-4x3.png /boot/grub/themes/kali/background.png
+    fi
     # Rebuild the grub configuration with our config changes
     if which update-grub >/dev/null; then
 	update-grub || true
diff --git a/share/grub/themes/kali/background.png b/share/grub/themes/kali/background.png
new file mode 120000
index 00000000..c9b74bce
--- /dev/null
+++ b/share/grub/themes/kali/background.png
@@ -0,0 +1 @@
+grub-16x9.png
\ No newline at end of file
diff --git a/share/grub/themes/kali/theme.txt b/share/grub/themes/kali/theme.txt
index 3acefeb1..313d383f 100644
--- a/share/grub/themes/kali/theme.txt
+++ b/share/grub/themes/kali/theme.txt
@@ -1,7 +1,7 @@
 
 # Global Property
 title-text: ""
-desktop-image: "grub-16x9.png"
+desktop-image: "background.png"
 desktop-color: "#2f5595"
 terminal-font: "Unifont Regular 16"
 terminal-left: "0"