I am operating CUPS 2.2.10 (Raspberry Pi). I’ve two Zebra label printers related to USB ports. Every is configured in CUPS. They print high-quality with no points except one printer is turned off. Then if a job is distributed to that printer, CUPS freezes and will not ship jobs to both printer.
lp command merely hangs and will not full, it doesn’t matter what. It’s essential to delete the roles from that printer’s queue earlier than any jobs might be despatched to any printer.
Methods to repair this? It appears there must be a timeout that expires on jobs despatched to offline printers. Additionally, why does one printer being offline trigger the
lp command to freeze on any execution, even with out command-line parameters? It additionally appears printer communication must be asynchronous – even when one printer is offline/frozen and may’t print gadgets in its queue, different printers ought to nonetheless work.
Thanks for any recommendation.