diff -ur qt-everywhere-opensource-src-4.6.2/src/gui/dialogs/qprintdialog_unix.cpp qt-everywhere-opensource-src-4.6.2-cups/src/gui/dialogs/qprintdialog_unix.cpp
--- qt-everywhere-opensource-src-4.6.2/src/gui/dialogs/qprintdialog_unix.cpp	2010-02-11 16:55:22.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.2-cups/src/gui/dialogs/qprintdialog_unix.cpp	2010-02-28 04:34:16.000000000 +0100
@@ -569,6 +569,32 @@
 void QPrintDialogPrivate::selectPrinter(QCUPSSupport *cups)
 {
     options.duplex->setEnabled(cups && cups->ppdOption("Duplex"));
+
+    if (cups) {
+        const ppd_option_t* duplex = cups->ppdOption("Duplex");
+        if (duplex) {
+            // copy default ppd duplex to qt dialog
+            if (qstrcmp(duplex->defchoice, "DuplexTumble") == 0)
+                options.duplexShort->setChecked(true);
+            else if (qstrcmp(duplex->defchoice, "DuplexNoTumble") == 0)
+                options.duplexLong->setChecked(true);
+            else
+                options.noDuplex->setChecked(true);
+        }
+
+        if (cups->currentPPD()) {
+            // set default color
+            if (cups->currentPPD()->color_device)
+                options.color->setChecked(true);
+            else
+                options.grayscale->setChecked(true);
+        }
+
+        // set collation
+        const ppd_option_t *collate = cups->ppdOption("Collate");
+        if (collate)
+            options.collate->setChecked(qstrcmp(collate->defchoice, "True")==0);
+    }
 }
 #endif
 
diff -ur qt-everywhere-opensource-src-4.6.2/src/gui/painting/qprinter.cpp qt-everywhere-opensource-src-4.6.2-cups/src/gui/painting/qprinter.cpp
--- qt-everywhere-opensource-src-4.6.2/src/gui/painting/qprinter.cpp	2010-02-11 16:55:22.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.2-cups/src/gui/painting/qprinter.cpp	2010-02-28 04:55:15.000000000 +0100
@@ -627,6 +627,44 @@
                && d_ptr->paintEngine->type() != QPaintEngine::MacPrinter) {
         setOutputFormat(QPrinter::PdfFormat);
     }
+
+#if !defined(QT_NO_CUPS) && !defined(QT_NO_LIBRARY)
+    // fill in defaults from ppd file
+    QCUPSSupport cups;
+
+    int printernum = -1;
+    for (int i = 0; i < cups.availablePrintersCount(); i++) {
+        if (printerName().toLocal8Bit() == cups.availablePrinters()[i].name)
+            printernum = i;
+    }
+    if (printernum >= 0) {
+        cups.setCurrentPrinter(printernum);
+
+        const ppd_option_t* duplex = cups.ppdOption("Duplex");
+        if (duplex) {
+            // copy default ppd duplex to qt dialog
+            if (qstrcmp(duplex->defchoice, "DuplexTumble") == 0)
+                setDuplex(DuplexShortSide);
+            else if (qstrcmp(duplex->defchoice, "DuplexNoTumble") == 0)
+                setDuplex(DuplexLongSide);
+            else
+                setDuplex(DuplexNone);
+        }
+
+        if (cups.currentPPD()) {
+            // set default color
+            if (cups.currentPPD()->color_device)
+                setColorMode(Color);
+            else
+                setColorMode(GrayScale);
+        }
+
+        // set collation
+        const ppd_option_t *collate = cups.ppdOption("Collate");
+        if (collate)
+            setCollateCopies(qstrcmp(collate->defchoice, "True")==0);
+    }
+#endif
 }
 
 /*!