I send the wrong job to the printer. It's a long one, so I disconnect the printer from the network, clear the print job on my PC, power off the printer, power it back up and reconnect the printer. Nothing will now print.
system-config-printer (the CUPS config GUI) reports that the printer is "idle - Processing page 9...". Shutdown/restarting the PC clears the fault.
Is it CUPS or the printer driver that is confused, and how do I clear the thing without rebooting?