and it seems that there is either a firmware bug in the AirPrint-supporting Canon printers or some problem with the client-side IPP implementation (which is in libcups, part of CUPS).
Michael Sweet, author of CUPS, will get a Canon printer on the coming Wednesday for further investigation.
Moving this bug to CUPS, system-config-printer has nothing to do with it.
A similar report got also to CUPS upstream:
https:/ /github. com/apple/ cups/issues/ 5512
and it seems that there is either a firmware bug in the AirPrint-supporting Canon printers or some problem with the client-side IPP implementation (which is in libcups, part of CUPS).
Michael Sweet, author of CUPS, will get a Canon printer on the coming Wednesday for further investigation.
Moving this bug to CUPS, system- config- printer has nothing to do with it.