Display the add-on selection dialog even when a DUD add-on is present…

… (bsc#1174562)

src/include/add-on/add-on-workflow.rb

@@ -910,7 +910,7 @@ def RunAddOnMainDialog(enable_back, enable_next, enable_abort, back_button, next
       ret = nil
 
       not_enough_memory = Stage.initial && HasInsufficientMemory()
-      no_addons = Builtins.size(AddOnProduct.add_on_products) == 0
+      no_addons = product_addons.empty?
 
       # bugzilla #239630
       # It might be dangerous to add more installation sources in installation
@@ -1909,7 +1909,7 @@ def media_type_selection
     # @return [Boolean] `true` if the addons should be offered automatically
     #
     def offer_media_addons?
-      if !AddOnProduct.add_on_products.empty? || !Stage.initial || !Y2Packager::MediumType.offline?
+      if !product_addons.empty? || !Stage.initial || !Y2Packager::MediumType.offline?
         return false
       end
 
@@ -1941,5 +1941,12 @@ def product_label(product)
       # fallback to the internal product name
       selected_product&.display_name || product
     end
+
+    # return product addons (i.e. filter out the Driver Update add-ons)
+    # @return [Array<Hash>] the addons without the driver update add-ons
+    def product_addons
+      # the product name contains the DUD number, e.g. it is "Driver Update 0" for the first DUD
+      AddOnProduct.add_on_products.reject{|a| a["product"].start_with?("Driver Update")}
+    end
   end
 end