diff -u -r qtbase-opensource-src-5.9.1/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp qtbase-opensource-src-5.9.1-ftharmony/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
--- qtbase-opensource-src-5.9.1/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp	2017-06-28 11:54:29.000000000 +0200
+++ qtbase-opensource-src-5.9.1-ftharmony/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp	2017-09-19 21:31:27.803755180 +0200
@@ -786,6 +786,7 @@
     m_subPixelPositionCount = 4;
     forceAutoHint = false;
     stemDarkeningDriver = false;
+    hasLcdRendering = false;
 }
 
 QFontEngineFT::~QFontEngineFT()
@@ -909,6 +910,15 @@
     }
 #endif
 
+    FT_Int amajor = 0, aminor = 0, apatch = 0;
+    FT_Library_Version(qt_getFreetype(), &amajor, &aminor, &apatch);
+    if (amajor > 2 || amajor == 2 && (aminor > 8 || aminor == 8 && apatch >= 1))
+        hasLcdRendering = true;
+#if defined(QT_USE_FREETYPE_LCDFILTER)
+    else if (FT_Library_SetLcdFilter(qt_getFreetype(), FT_LCD_FILTER_NONE) == FT_Err_Ok)
+        hasLcdRendering = true;
+#endif
+
     fontDef.styleName = QString::fromUtf8(face->style_name);
 
     if (!freetype->hbFace) {
@@ -1165,21 +1175,19 @@
 
     int glyph_buffer_size = 0;
     QScopedArrayPointer<uchar> glyph_buffer;
+    if (hasLcdRendering && slot->format == FT_GLYPH_FORMAT_OUTLINE && (hsubpixel || vfactor != 1)) {
 #if defined(QT_USE_FREETYPE_LCDFILTER)
-    bool useFreetypeRenderGlyph = false;
-    if (slot->format == FT_GLYPH_FORMAT_OUTLINE && (hsubpixel || vfactor != 1)) {
-        err = FT_Library_SetLcdFilter(slot->library, (FT_LcdFilter)lcdFilterType);
-        if (err == FT_Err_Ok)
-            useFreetypeRenderGlyph = true;
-    }
+        FT_Library_SetLcdFilter(slot->library, (FT_LcdFilter)lcdFilterType);
+#endif
 
-    if (useFreetypeRenderGlyph) {
         err = FT_Render_Glyph(slot, hsubpixel ? FT_RENDER_MODE_LCD : FT_RENDER_MODE_LCD_V);
 
         if (err != FT_Err_Ok)
             qWarning("render glyph failed err=%x face=%p, glyph=%d", err, face, glyph);
 
+#if defined(QT_USE_FREETYPE_LCDFILTER)
         FT_Library_SetLcdFilter(slot->library, FT_LCD_FILTER_NONE);
+#endif
 
         info.height = slot->bitmap.rows / vfactor;
         info.width = hsubpixel ? slot->bitmap.width / 3 : slot->bitmap.width;
@@ -1193,9 +1201,7 @@
             convertRGBToARGB(slot->bitmap.buffer, (uint *)glyph_buffer.data(), info.width, info.height, slot->bitmap.pitch, subpixelType != Subpixel_RGB, false);
         else if (vfactor != 1)
             convertRGBToARGB_V(slot->bitmap.buffer, (uint *)glyph_buffer.data(), info.width, info.height, slot->bitmap.pitch, subpixelType != Subpixel_VRGB, false);
-    } else
-#endif
-    {
+    } else {
     int left  = slot->metrics.horiBearingX;
     int right = slot->metrics.horiBearingX + slot->metrics.width;
     int top    = slot->metrics.horiBearingY;
diff -u -r qtbase-opensource-src-5.9.1/src/platformsupport/fontdatabases/freetype/qfontengine_ft_p.h qtbase-opensource-src-5.9.1-ftharmony/src/platformsupport/fontdatabases/freetype/qfontengine_ft_p.h
--- qtbase-opensource-src-5.9.1/src/platformsupport/fontdatabases/freetype/qfontengine_ft_p.h	2017-06-28 11:54:29.000000000 +0200
+++ qtbase-opensource-src-5.9.1-ftharmony/src/platformsupport/fontdatabases/freetype/qfontengine_ft_p.h	2017-09-19 21:27:52.433263233 +0200
@@ -311,6 +311,7 @@
     bool cacheEnabled;
     bool forceAutoHint;
     bool stemDarkeningDriver;
+    bool hasLcdRendering;
 
 private:
     friend class QFontEngineFTRawFont;