From 3f4a677d0ce669b6b56107bd3f59acd68342c0ab Mon Sep 17 00:00:00 2001
From: Julian Orth <ju.orth@gmail.com>
Date: Fri, 12 Jul 2024 00:47:01 +0200
Subject: [PATCH] metal: don't overwrite active FB in non-FB flip events

---
 src/backends/metal/video.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/backends/metal/video.rs b/src/backends/metal/video.rs
index 9dfa1792..cfe9332a 100644
--- a/src/backends/metal/video.rs
+++ b/src/backends/metal/video.rs
@@ -2172,9 +2172,9 @@ impl MetalBackend {
             _ => return,
         };
         connector.can_present.set(true);
-        connector
-            .active_framebuffer
-            .set(connector.next_framebuffer.take());
+        if let Some(fb) = connector.next_framebuffer.take() {
+            connector.active_framebuffer.set(Some(fb));
+        }
         if connector.has_damage.get() || connector.cursor_changed.get() {
             connector.schedule_present();
         }