From 3604fc83a2c2f8ab4ae7ec1f0dde1ef25ca34708 Mon Sep 17 00:00:00 2001
From: bbedward <bbedward@gmail.com>
Date: Fri, 28 Aug 2026 09:07:33 -0400
Subject: [PATCH] brightness/ddc: add an option to disable DDC probing

---
 core/internal/server/brightness/manager.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/internal/server/brightness/manager.go b/core/internal/server/brightness/manager.go
index c2fd47332..44f2afd8e 100644
--- a/core/internal/server/brightness/manager.go
+++ b/core/internal/server/brightness/manager.go
@@ -2,6 +2,7 @@ package brightness
 
 import (
 	"fmt"
+	"os"
 	"sort"
 	"strings"
 	"time"
@@ -41,6 +42,10 @@ func (m *Manager) initLogind() {
 }
 
 func (m *Manager) initDDC() {
+	if os.Getenv("DMS_NO_DDC") != "" {
+		log.Info("DDC backend disabled via DMS_NO_DDC")
+		return
+	}
 	ddc, err := NewDDCBackend()
 	if err != nil {
 		log.Debugf("Failed to initialize DDC backend: %v", err)