Thanks a lot Samuel, your screen shots have helped me get to the bottom
of the issue.
Credentials from the keyring are not inserted by the gtk dialog, but by
another process (system-config-printer-applet) after the print dialog
has sent the job to the server. CUPS sets AuthInfoRequired when
authentication fails for some reason (maybe the printer was unreachable
or the password changed). From this point on, the print dialog thinks it
needs to ask for credentials, because it doesn't know that system-
config-printer will insert them later. Hence, simply clicking OK without
entering the password works.
The fix will be to have the gtk dialog read credentials from the
keyring. I'm assigning myself to do this, but it's too late in the cycle
to get this into 12.04.
I'm afraid the only workarounds -- short of patching CUPS or gtk -- are
removing the AuthInfoRequired line manually every time it is changed or
simply confirming the password prompt with empty user name and password.
** Changed in: cups (Ubuntu)
Assignee: (unassigned) => Lars Uebernickel (larsu)
** Changed in: cups (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/959451
Title:
Credentials from gnome-keyring is not used while printing
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