On Fri 31 Jan 2020 at 18:52:13 +0100, Till Kamppeter wrote: > On 31/01/2020 18:03, Brian Potkin wrote: > > > > The ability to scan, if it exists, is also lost. I'd be inclined to > > guide a user down a driver path. > > > > We have several improvements on that front: > > Most important is the new ipp-usb project: > > https://github.com/alexpevzner/ipp-usb/
[...] > So I recommend for Debian: > > 1. replace ippusbxd by ipp-usb (the latter should be debianized ASAP). That is someone else's call. > 2. Update SANE to 1.0.19 and also add the "airscan" backend. 1.0.29 with the sane-escl backend has just been released. I expect the Debian maintainer will package it in due course. sane-airscan isn't yet in upstream SANE and, it seems to me, upstream is not falling over itself to get it there:. https://gitlab.com/sane-project/backends/issues/202 I would be happy to see sane-airscan as a separate package in Debian. It appears to do the job at least as competently as sane-escl. > 3. Recommend driverless printing and scanning also on multi-function > devices, on both network and USB. In principle I would subscribe to this. I already operate my ENVY 4500 on the network in this fashion. However, I am having difficulty in understanding how one uses the escl protocol for scanning with a USB-only device. JFTR. The HP Ink Tank 310, a modern (2018/19) USB-only printer is reported by a user to give bInterfaceClass 7 Printer bInterfaceSubClass 1 Printer bInterfaceProtocol 2 Bidirectional with 'lsusb -v'. I think bInterfaceProtocol needs to be 4 for IPP USB to be a feature of the printer's design. Drivers only here, I would say. Regards, Brian.
