After a fresh update of CUPS, and a fresh "Add Printer", selecting the first (gutenberg) model option, printing a pdf page from xpdf caused display of GUI message boxes indicating "printing started" and "printing completed", but no printer output.
At localhost:631 -> Job Management, "Show all jobs" gives: ▲ ID ▲ Name User Size Pages State HP-LaserJet-3050-1 Unknown Withheld 8k Unknown completed at Sat Jun 23 20:42:53 2018 so CUPS processed the job, but the printer stands silently oblivious, displaying "Ready". So why no printing? $ lsusb Bus 001 Device 005: ID 03f0:3217 Hewlett-Packard LaserJet 3050 $ lpstat -t scheduler is running system default destination: HP-LaserJet-3050 device for HP-LaserJet-3050: hp:/usb/HP_LaserJet_3050?serial=00CNCKR73450 device for HP-LaserJet-3050-Fax: hpfax:/usb/HP_LaserJet_3050?serial=00CNCKR73450 device for HP_LaserJet_3050: hp:/usb/HP_LaserJet_3050?serial=00CNCKR73450 HP-LaserJet-3050 accepting requests since Sat 23 Jun 2018 20:42:53 AEST HP-LaserJet-3050-Fax accepting requests since Sat 23 Jun 2018 20:27:56 AEST HP_LaserJet_3050 accepting requests since Sat 23 Jun 2018 20:40:42 AEST printer HP-LaserJet-3050 is idle. enabled since Sat 23 Jun 2018 20:42:53 AEST ready to print printer HP-LaserJet-3050-Fax is idle. enabled since Sat 23 Jun 2018 20:27:56 AEST printer HP_LaserJet_3050 is idle. enabled since Sat 23 Jun 2018 20:40:42 AEST $ lpq -PHP-LaserJet-3050 HP-LaserJet-3050 is ready no entries I'd like to try an "lpc up", but lpc seems not to be there, and I don't know which package would have it. Any prodding in the direction of an exit from the maze would be most welcome. Erik