From 4f2268bbfe3d95639474a35d91cec6ba3fa2e868 Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Sat, 1 Mar 2025 19:24:56 +0100
Subject: [PATCH] graphics/vesad: Exit gracefully when there is no boot
 framebuffer

---
 graphics/vesad/src/main.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/graphics/vesad/src/main.rs b/graphics/vesad/src/main.rs
index fa1b8bd53e..541ce13d79 100644
--- a/graphics/vesad/src/main.rs
+++ b/graphics/vesad/src/main.rs
@@ -21,6 +21,11 @@ fn main() {
         spec.push(());
     }
 
+    if env::var("FRAMEBUFFER_WIDTH").is_err() {
+        println!("vesad: No boot framebuffer");
+        return;
+    }
+
     let width = usize::from_str_radix(
         &env::var("FRAMEBUFFER_WIDTH").expect("FRAMEBUFFER_WIDTH not set"),
         16,
@@ -48,6 +53,7 @@ fn main() {
     );
 
     if phys == 0 {
+        println!("vesad: Boot framebuffer at address 0");
         return;
     }