From 33c17d128bdf1f3a10e086b2b13a1ec655bcf7ed Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@xry111.site>
Date: Wed, 30 Oct 2024 19:59:56 +0800
Subject: [PATCH] drm-panic: grub: Set up the VESA framebuffer for the kernel

In the previous commit we've enabled the kernel to use the SimpleDRM
driver on the VESA framebuffer.  Now provide the VESA framebuffer to the
kernel.
---
 chapter10/grub.xml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/chapter10/grub.xml b/chapter10/grub.xml
index 1706ccb3c..00be1d6c0 100644
--- a/chapter10/grub.xml
+++ b/chapter10/grub.xml
@@ -135,6 +135,7 @@ set timeout=5
 insmod part_gpt
 insmod ext2
 set root=(hd0,2)
+set gfxpayload=1024x768x32
 
 menuentry "GNU/Linux, Linux &linux-version;-lfs-&version;" {
         linux   /boot/vmlinuz-&linux-version;-lfs-&version; root=/dev/sda2 ro
@@ -159,6 +160,14 @@ EOF</userinput></screen>
       be needed with some rare configurations.
     </para>
 
+    <para>
+      The <command>set gfxpayload=1024x768x32</command> command sets the
+      resolution and color depth of the VESA framebuffer to be passed to the
+      kernel.  It's necessary for the kernel SimpleDRM driver to use the
+      VESA framebuffer.  You can use a different resolution or color depth
+      value which better suits for your monitor.
+    </para>
+
     <note><para>From <application>GRUB</application>'s perspective, the
     kernel files are relative to the partition used.  If you
     used a separate /boot partition, remove /boot from the above