[cups.general] Unable to print to USB

Tim Waugh twaugh at redhat.com
Wed Feb 24 01:13:19 PST 2010


On Wed, 2010-02-24 at 09:44 +0100, Johannes Meixner wrote:
> In contrast to the "hp" backend which privides bidirectional
> communication (e.g. for scanning and for device status info)
> the generic CUPS "usb" backend does only unidirectional
> data transfer to the printer so that device status information
> and scanning for HP all-in-one devices is no longer possible
> with the generic CUPS "usb" backend,

This isn't really true, it's just that the HPLIP *filter* doesn't use
the back-channel facility.  It should use the back-channel facility (all
it needs is the IEEE 1284 Device ID actually), and then we won't need
the hp backend any more.

Tim.
*/

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