[kwin] [Bug 358646] Rendering breaks if Triple Buffer detection gives NOT available

[Thomas Lübking via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=358646

--- Comment #8 from Thomas Lübking <thomas.luebk...@gmail.com> ---
You did not happen to accidentally enable m_haveINTELSwapEvent ?

Otherwise (just a wild guess)

diff --git a/glxbackend.cpp b/glxbackend.cpp
index c59c647..da6905c 100644
--- a/glxbackend.cpp
+++ b/glxbackend.cpp
@@ -735,10 +735,10 @@ void GlxBackend::endRenderingFrame(const QRegion
&renderedRegion, const QRegion
         // In this case we won't post the back buffer. Instead we'll just
         // set the buffer age to 1, so the repaired regions won't be
         // rendered again in the next frame.
-        if (!renderedRegion.isEmpty())
+//         if (!renderedRegion.isEmpty())
             glFlush();

-        m_bufferAge = 1;
+//         m_bufferAge = 1;
         return;
     }

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