From a1bcc8e84898ae700b68df1b2fcfda75dced7731 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Mon, 31 Aug 2015 08:58:25 +0200
Subject: [PATCH] [drm] Don't present on an output which is in dpms standby

It will fail if the output is not on, so let's don't try to present
on a disabled output.
---
 backends/drm/drm_backend.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/backends/drm/drm_backend.cpp b/backends/drm/drm_backend.cpp
index bebc96dc06..0a0c970031 100644
--- a/backends/drm/drm_backend.cpp
+++ b/backends/drm/drm_backend.cpp
@@ -557,6 +557,9 @@ bool DrmOutput::present(DrmBuffer *buffer)
         m_currentBuffer = buffer;
         return false;
     }
+    if (m_dpmsMode != DpmsMode::On) {
+        return false;
+    }
     if (m_currentBuffer) {
         return false;
     }