[cups.general] USB printer statuses

Michael Sweet msweet at apple.com
Fri Apr 8 22:12:45 PDT 2011


On Apr 8, 2011, at 12:45 AM, Paul Budzinsky wrote:
> What statuses are reported by Generic USB backend and what what protocol (Device ID ?) is used to query them from a printer if any?


That depends on the OS and whether libusb is installed. The bare-bones USB character device version will report paper out, but nothing else without the driver (filter) interrogating the printer.

The IEEE-1284 device ID string is not used for status monitoring by the backend, however drivers can query the current value to provide status as needed.

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Michael Sweet, Senior Printing System Engineer, PWG Chair





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