Comment # 4 on bug 939541 from Thomas Schmid

Hi Johannes,

>Does it also work for you when you first uses [Driver Packages]
>and then specify the connection via [Connection Wizard]?
No it does NOT: 

Note: PPD is for a Canon iR ADV C5235i

First:
"Add New Printer Configuration": click [Driver Packages] results
  "Driver Packages": click [Browse],
                   select the locally stored printer description file
                   click [OK] results
  "Restart locally running CUPS daemon": click [Yes] results
    "wating half a minute ... to get ready ..." (just wait) goes back to
"Add New Printer Configuration":

Then:
click [Connection Wizard] results
  "Connection Wizard": select "TCP Port (Appsocket/JetDirect) results
     "Connection Settings": sppecify connection (socket, <IP>, port 9100),
                       test it (= OK),
                       choose "canon" manufacturer,
                       click [OK] goes back to
"Add New Printer Configuration":

Then:
"Find and assign a Driver": "Search for" has "canon" selected
  Presents a huge list of Canon drivers

But:
My Canon PPD-based driver for the iR ADV C5235i is NOT present in this list.

Attached y2logs as requested.