From 13f4fd84e41388872cf125a3c78b50e53fb54389 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Fri, 22 Nov 2024 14:08:48 +0000
Subject: [PATCH] backends/drm: don't set the dpms mode to AboutToTurnOff if
 the screen is already off

Otherwise, DrmOutput::setDrmDpmsMode will inhibit the renderloop for a second time, and it'll
never be completely un-inhibited, which means the screen stays off.


(cherry picked from commit d90c64bc7cfcd4dc56c82549e161333b689de813)

Co-authored-by: Xaver Hugl <xaver.hugl@gmail.com>
---
 src/backends/drm/drm_output.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/backends/drm/drm_output.cpp b/src/backends/drm/drm_output.cpp
index b406e640cf..051f6f272d 100644
--- a/src/backends/drm/drm_output.cpp
+++ b/src/backends/drm/drm_output.cpp
@@ -142,6 +142,9 @@ QList<std::shared_ptr<OutputMode>> DrmOutput::getModes() const
 
 void DrmOutput::setDpmsMode(DpmsMode mode)
 {
+    if (mode == dpmsMode()) {
+        return;
+    }
     if (mode == DpmsMode::Off) {
         if (!m_turnOffTimer.isActive()) {
             updateDpmsMode(DpmsMode::AboutToTurnOff);