Hi there,

In view of bug 889187, I tried to add a network printer via dnssd with
system-config-printer. It does find the printer, but under KDE some kind of
"helper" screen (apper related maybe?) appears with an error. (See attachment
#1 [details]) Then, after dismissing the error, system-config-printer gets stuck at
"searching for drivers". (See attachment #2 [details]) At this point, it gets stuck. I
have let it sit there for 5 minutes on a very fast computer, and I have very
few drivers installed (no Gutenprint or HPLIP) so it definitely should not be
searching for long. I believe that an internal python process is crashing, as
the terminal spits out this error when it starts searching for drivers:

----------------------
ERROR:dbus.proxies:Introspect error on :1.344:/org/freedesktop/PackageKit:
dbus.exceptions.IntrospectionParserException: Error parsing introspect data:
<class 'xml.parsers.expat.ExpatError'>: unbound prefix: line 5, column 4
HTTP Status 403
None
Exception in thread Thread-3:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/site-packages/cupshelpers/openprinting.py", line 54,
in run
    self.callback (403, self.user_data, None)
  File "/usr/lib/python2.7/site-packages/cupshelpers/openprinting.py", line
163, in parse_result
    callback (status, user_data, result)
  File "/usr/share/system-config-printer/newprinter.py", line 3267, in
openprinting_printers_found
    print traceback.extract_tb(printers[2], limit=None)
TypeError: 'NoneType' object has no attribute '__getitem__'
----------------------

I don't really care if it finds the correct driver or not, as long as it lets
me manually select my correct driver, which I can't do.

When running system-config-printer as root in IceWM, the KDE "helper" error
dialog doesn't appear. But it still gets stuck on "searching for drivers".

Thanks for looking into this!