diff --git a/effects/glide/glide.h b/effects/glide/glide.h
--- a/effects/glide/glide.h
+++ b/effects/glide/glide.h
@@ -25,7 +25,9 @@
 
 #include <kwineffects.h>
 
-class QTimeLine;
+#include <QSet>
+#include <QString>
+#include <QTimeLine>
 
 namespace KWin
 {
@@ -85,6 +87,7 @@
         GlideOut = 3
     };
     EffectStyle effect;
+    QSet<QString> blacklist;
 };
 
 class GlideEffect::WindowInfo
diff --git a/effects/glide/glide.cpp b/effects/glide/glide.cpp
--- a/effects/glide/glide.cpp
+++ b/effects/glide/glide.cpp
@@ -60,6 +60,7 @@
     duration = animationTime<GlideConfig>(350);
     effect = (EffectStyle) GlideConfig::glideEffect();
     angle = GlideConfig::glideAngle();
+    blacklist = GlideConfig::blacklist().toSet();
 }
 
 void GlideEffect::prePaintScreen(ScreenPrePaintData& data, int time)
@@ -209,6 +210,8 @@
         return false;
     if (!w->isVisible())
         return false;
+    if (blacklist.contains(w->windowClass()))
+        return false;
     if (w->data(IsGlideWindow).toBool())
         return true;
     if (w->hasDecoration())
diff --git a/effects/glide/glide.kcfg b/effects/glide/glide.kcfg
--- a/effects/glide/glide.kcfg
+++ b/effects/glide/glide.kcfg
@@ -14,5 +14,8 @@
         <entry name="GlideAngle" type="Int">
             <default>-90</default>
         </entry>
+        <entry name="Blacklist" type="StringList">
+            <default>ksmserver ksmserver,ksplashx ksplashx,ksplashsimple ksplashsimple,ksplashqml ksplashqml</default>
+        </entry>
     </group>
 </kcfg>