diff --git a/libkwineffects/kwinglplatform.cpp b/libkwineffects/kwinglplatform.cpp
index 8955612095..ba9600fcd1 100644
--- a/libkwineffects/kwinglplatform.cpp
+++ b/libkwineffects/kwinglplatform.cpp
@@ -753,6 +753,11 @@ void GLPlatform::detect(OpenGLPlatformInterface platformInterface)
             m_driverVersion = parseVersionString(versionTokens.at(index + 1));
         else
             m_driverVersion = 0;
+
+        if (qgetenv("QT_OPENGL_NO_SANITY_CHECK").isNull()) {
+            // workaround for QTBUG-34898
+            m_recommendedCompositor = XRenderCompositing;
+        }
     }
 
 
@@ -825,6 +830,10 @@ void GLPlatform::detect(OpenGLPlatformInterface platformInterface)
         } else {
             m_recommendedCompositor = OpenGL2Compositing;
         }
+        if (m_chipClass == SandyBridge && m_renderer.contains("Mobile") && qgetenv("QT_OPENGL_NO_SANITY_CHECK").isNull()) {
+            // workaround for QTBUG-34898
+            m_recommendedCompositor = XRenderCompositing;
+        }
     }
 
     if (isMesaDriver() && platformInterface == EglPlatformInterface) {