This is a problem of the architecture of CUPS. CUPS supports only setting up local printers if the printers are actually connected and turned on. It does not support device-based URIs like usb:/dev/usblp0, only device-ID based URIs, like usb://hp/laserjet_3390.
This is a problem of the architecture of CUPS. CUPS supports only setting up local printers if the printers are actually connected and turned on. It does not support device-based URIs like usb:/dev/usblp0, only device-ID based URIs, like usb://hp/ laserjet_ 3390.