Same problem for me. I have an old parallel-only printer. It has been working with a dedicated printer server, but the printer server died and the PC has no parallel port. So I connected a USB-to-LPT cable. As I attach the cable /var/log/syslog shows:
parport0: fix this legacy no-device port driver! lp0: using parport0 (polling) There does not exist a /dev/usb/lp0. I still set "DeviceURI parallel:/dev/usb/lp0" since that is what the instructions still say (https://wiki.ubuntu.com/DebuggingPrintingProblems#USB_-.3E_Parallel_adapter), and indeed that fails. I also tried "DeviceURI parallel:/dev/parport0" and CUPS rejected it. Then I tried "DeviceURI parallel:/dev/lp0". CUPS accepted it, I sent a test print, and it just sits on the job queue with the msg "Printer not connected; will retry in 30 seconds". # usb_printerid /dev/lp0 Error: Invalid argument: GET_DEVICE_ID on '/dev/lp0' # usb_printerid /dev/parport0 Error: Invalid argument: GET_DEVICE_ID on '/dev/parport0' At another moment, I got a different error: # usb_printerid /dev/lp0 Error: Device or resource busy: can't open '/dev/lp0' This is on Bionic. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/910272 Title: USB->Parallel adapter produces crappy device URI and CUPS "usb" backend cannot cope with it To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/910272/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
