[sane-devel] escl backend and ippusbxd

Rolf Bensch rolf at bensch-online.de
Fri Mar 20 17:59:31 GMT 2020

Many thanks for your explanations.


Am 20.03.20 um 12:38 schrieb Till Kamppeter:
> On 20/03/2020 12:29, Thierry HUCAHRD wrote:
>> Hi,
>> No, this has nothing to do with eSCL.
>> ippusbxd allows you to use escl backends on the usb.
>> The problem is that sane doesn't detect the scanner on the usb
>> anymore, so PIXMA can't be used anymore.
>> I don't know if ippusbxd solved the problem?
>> in any case if the device has a usb driver, ippusbxd is not necessary!
> On the other side if you have ippusbxd or ipp-usb running you do not
> need one of the device-specific USB drivers like pixma, as
> IPP-over-USB is designed for driverless operation of multi-function
> devices and so every device which supports IPP-over-USB also supports
> printing and scanning using manufacturer-independent standards, for
> scanning currenly usually eSCL. So with an IPP-over-USB daemon
> (ippusbxd or ipp-usb) running you are supposed to scan with an eSCL
> backend (escl or airscan). This way multi-function devices which are
> not from HP (HPLIP) or from Canon (pixma) scan with free software.
>    Till

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