[cups.bugs] [LOW] STR #1762: IPP backend failed because of unsupported printer IPP attribute

[George Liu]

[STR New]

CUPS 1.2 should provide alternative work flow if some IPP attributes are
not supported by the printer. That will improve the robustness of CUPS
software and provide support for more printers.

E.g. In ipp.c, around line 967. ipp backend waits for job-state for job
completion and reports job-media-sheets-completed to end user.

if job-state attribute is not supported (even if it is a required
attribute), it should just assume the job is done rather than return
failed. (which requires user to cancel the printed job and restart the
queue)

job-media-sheets-completed is a optional attribute, ipp backend should not
return failed if this attribute is not supported. 

Initial testing suggests Ricoh Aficio 2035 does not support job-state and
job-media-sheets-completed.

Link: http://www.cups.org/str.php?L1762
Version: 1.2.1