diff -up kdelibs-4.9.0/solid/solid/backends/udisks/udisksstorageaccess.cpp.solid-detach-external-hdd kdelibs-4.9.0/solid/solid/backends/udisks/udisksstorageaccess.cpp
--- kdelibs-4.9.0/solid/solid/backends/udisks/udisksstorageaccess.cpp.solid-detach-external-hdd	2012-07-20 03:07:42.000000000 -0500
+++ kdelibs-4.9.0/solid/solid/backends/udisks/udisksstorageaccess.cpp	2012-08-29 10:25:28.162850570 -0500
@@ -204,7 +204,14 @@ void UDisksStorageAccess::slotDBusReply(
                 QDBusMessage msg = QDBusMessage::createMethodCall(UD_DBUS_SERVICE, drivePath, UD_DBUS_INTERFACE_DISKS_DEVICE, "DriveEject");
                 msg << QStringList();   // options, unused now
                 c.call(msg, QDBus::NoBlock);
-            }
+                // power down removable USB hard drives, rhbz#852196
+                UDisksDevice drive(drivePath);
+                if (drive.prop("DriveCanDetach").toBool()) {
+                    QDBusMessage msg2 = QDBusMessage::createMethodCall(UD_DBUS_SERVICE, drivePath, UD_DBUS_INTERFACE_DISKS_DEVICE, "DriveDetach");
+                    msg2 << QStringList();   // options, unused now
+                    c.call(msg2, QDBus::NoBlock);
+                }
+            }  
 
             slotChanged();
         }