From df01de7d6112f48393e89d40c9bde8eeb6b4153d Mon Sep 17 00:00:00 2001
From: Tom Englund <tomenglund26@gmail.com>
Date: Mon, 4 Nov 2024 12:58:52 +0100
Subject: [PATCH] drm: dont commit state if renderer is missing

setting certain env vars to force egl implentations makes the render
creation fail on the second gpu. instead of causing a coredump,
safeguard commitState and let the monitor turn blank instead.
---
 src/backend/drm/DRM.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend/drm/DRM.cpp b/src/backend/drm/DRM.cpp
index b278baf..f0f37af 100644
--- a/src/backend/drm/DRM.cpp
+++ b/src/backend/drm/DRM.cpp
@@ -1400,6 +1400,11 @@ bool Aquamarine::CDRMOutput::commitState(bool onlyTest) {
         return false;
     }
 
+    if (!backend->rendererState.renderer) {
+        backend->backend->log(AQ_LOG_ERROR, "drm: No renderer attached to backend");
+        return false;
+    }
+
     const auto&    STATE     = state->state();
     const uint32_t COMMITTED = STATE.committed;