Bug#486580: system-config-printer: Can't change printer settings

[Sam Morris]

On Tue, 2008-06-17 at 00:04 +0100, Sam Morris wrote:
> When trying to change the description of a printer, after pressing OK I
> am prompted to authenticate. After I do so, system-config-printer locks
> up, but in a strange way: controls on the screen still operate, but the
> OK/Cancel buttons do nothing.
> 
> The console contains the following message:
> 
> Traceback (most recent call last):
>   File "/usr/share/system-config-printer/contextmenu.py", line 115, in on_printer_context_edit_activate
>     self.parent.dests_iconview_item_activated (self.iconview, self.paths[0])
>   File "/usr/bin/system-config-printer", line 562, in dests_iconview_item_activated
>     if not self.save_printer (self.printer):
>   File "/usr/bin/system-config-printer", line 1293, in save_printer
>     printer.setJobSheets(job_sheet_start, job_sheet_end)
>   File "/var/lib/python-support/python2.5/cupsutils/cupshelpers.py", line 211, in setJobSheets
>     self.connection.setPrinterJobSheets(self.name, start, end)
>   File "/usr/share/system-config-printer/authconn.py", line 124, in <lambda>
>     return lambda *args, **kwds: self._authloop (fname, fn, *args, **kwds)
>   File "/usr/share/system-config-printer/authconn.py", line 130, in _authloop
>     result = fn.__call__ (*args, **kwds)
> TypeError: string or unicode object required

More info: I can close the printer-specific settings window with the
window manager's close button, but trying to do anything back in the
main system-config-printer window causes the following to be printed:

Traceback (most recent call last):
  File "/usr/bin/system-config-printer", line 543, in dests_iconview_item_activated
    self.fillPrinterTab (name)
  File "/usr/bin/system-config-printer", line 1684, in fillPrinterTab
    self.updatePrinterProperties ()
  File "/usr/bin/system-config-printer", line 1717, in updatePrinterProperties
    self.setPUsers(printer.except_users)
  File "/usr/bin/system-config-printer", line 1018, in setPUsers
    model.clear()
AttributeError: 'NoneType' object has no attribute 'clear'

-- 
Sam Morris <sam at robots.org.uk>