diff -up hplip-3.16.7/base/utils.py.ui-optional hplip-3.16.7/base/utils.py
--- hplip-3.16.7/base/utils.py.ui-optional	2016-07-15 12:12:28.000000000 +0200
+++ hplip-3.16.7/base/utils.py	2016-08-10 18:02:25.126595787 +0200
@@ -733,6 +733,13 @@ def checkPyQtImport(): # qt3
         if os.getenv('DISPLAY') and os.getenv('STARTED_FROM_MENU'):
             no_qt_message_gtk()
 
+        # hplip-gui sub-package (Fedora)
+        try:
+            import ui
+        except ImportError:
+            log.error("hplip-gui not installed.  GUI not available. Exiting.")
+            return False
+
         log.error("PyQt not installed. GUI not available. Exiting.")
         return False
 
@@ -783,7 +790,8 @@ def checkPyQtImport4():
         import PyQt5
         import ui5
     else:
-        log.debug("HPLIP is not installed properly or is installed without graphical support. Please reinstall HPLIP again")
+        # hplip-gui sub-package (Fedora) requires python3-qt5
+        log.error("Install the hplip-gui package for graphical support.")
         return False
     return True
 
@@ -2434,6 +2442,7 @@ def checkPyQtImport45():
     except ImportError as e:
         log.debug(e)
 
+    log.error("Install the hplip-gui package for graphical support.")
     raise ImportError("GUI Modules PyQt4 and PyQt5 are not installed")