From 348e72c56ec7e157cec15d8e27065e4194490d89 Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Thu, 19 Mar 2020 16:36:09 +0200
Subject: [PATCH] [scenes/opengl] Print a debug message when viewport limits
 aren't met

Summary:
This may help with debugging why compositing is suspended.

CCBUG: 418951

Test Plan: Compiles.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28139
---
 plugins/scenes/opengl/scene_opengl.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/plugins/scenes/opengl/scene_opengl.cpp b/plugins/scenes/opengl/scene_opengl.cpp
index d15e503174..36e6499405 100644
--- a/plugins/scenes/opengl/scene_opengl.cpp
+++ b/plugins/scenes/opengl/scene_opengl.cpp
@@ -800,8 +800,9 @@ bool SceneOpenGL::viewportLimitsMatched(const QSize &size) const {
     if (limit[0] < size.width() || limit[1] < size.height()) {
         auto compositor = static_cast<X11Compositor*>(Compositor::self());
         QMetaObject::invokeMethod(compositor, [compositor]() {
-                compositor->suspend(X11Compositor::AllReasonSuspend);
-            }, Qt::QueuedConnection);
+            qCDebug(KWIN_OPENGL) << "Suspending compositing because viewport limits are not met";
+            compositor->suspend(X11Compositor::AllReasonSuspend);
+        }, Qt::QueuedConnection);
         return false;
     }
     return true;