diff -Nur qt4-x11-4.5.0-orig/src/gui/text/qfontdatabase_x11.cpp qt4-x11-4.5.0/src/gui/text/qfontdatabase_x11.cpp
--- qt4-x11-4.5.0-orig/src/gui/text/qfontdatabase_x11.cpp	2009-04-25 20:22:01.000000000 +0900
+++ qt4-x11-4.5.0/src/gui/text/qfontdatabase_x11.cpp	2009-04-25 20:27:54.000000000 +0900
@@ -795,6 +795,7 @@
     if (scalable) {
         fontDef.stretch = request.stretch;
         fontDef.style = request.style;
+        fontDef.weight = request.weight;
     } else {
         int width;
         if (FcPatternGetInteger(pattern, FC_WIDTH, 0, &width) == FcResultMatch)
@@ -1370,6 +1371,43 @@
                 // keep the same pitch
                 equiv_enc->pitch = enc->pitch;
             }
+
+            for (int k = 0; k < foundry->count; ++k) {
+                QtFontStyle *style = foundry->styles[k];
+                if (style->key.weight > QFont::Normal) continue;
+
+                QtFontSize *size = style->pixelSize(SMOOTH_SCALABLE);
+                if (! size) continue; // should not happen
+                QtFontEncoding *enc = size->encodingID(-1, 0, 0, 0, 0, true);
+                if (! enc) continue; // should not happen either
+
+                QtFontStyle::Key key = style->key;
+
+                // does this style have an demibold equivalent?
+                key.weight = QFont::DemiBold;
+                QtFontStyle *equiv = foundry->style(key);
+                if (equiv) continue;
+
+                // does this style have an black equivalent?
+                key.weight = QFont::Black;
+                equiv = foundry->style(key);
+                if (equiv) continue;
+
+                // does this style have an bold equivalent?
+                key.weight = QFont::Bold;
+                equiv = foundry->style(key);
+                if (equiv) continue;
+
+                // let's fake one...
+                equiv = foundry->style(key, true);
+                equiv->smoothScalable = true;
+
+                QtFontSize *equiv_size = equiv->pixelSize(SMOOTH_SCALABLE, true);
+                QtFontEncoding *equiv_enc = equiv_size->encodingID(-1, 0, 0, 0, 0, true);
+
+                // keep the same pitch
+                equiv_enc->pitch = enc->pitch;
+            }
         }
     }
 #endif