[sane-devel] ***SPAM*** Re: Lexmark X215 backend (patch)

[ABC]

Hi,

On Wed, May 12, 2021 at 03:49:06PM -0700, Ralph Little wrote:
> On 2021-05-12 2:45 p.m., Andrzej Szombierski via sane-devel wrote:
> > Hello everyone,
> >
> > I got an old Lexmark X215 scanner/printer combo. The device is a
> > rebranded Samsung and it didn't take much to convince the xerox_mfp
> > backend to support it. I've made a preliminary patch (attached). I'm
> > posting it in case anyone else is interested in getting this ancient
> > device to work.
> >
> > In case anyone would think it's a good idea to merge this, below is a
> > summary of the oddities of this device and my patch.
> >
> > 1. It seems quite confusing to me, but both the printer and the
> > scanner utilize the same set of BULK usb endpoints, on a Printer class
> > interface. So they are skipped by sanei_usb. And even if they weren't,
> > the interface is usually claimed by usblp.
> > 2. To reduce interference with usblp, I've decided to utilize it
> > instead (or is there a better way?) So I've added a new transport
> > xerox_mfp-usblp. Instead of using sanei_usb (and libusb underneath),
> > data is sent directly to the usblp device. On startup, the usual paths
> > are searched for usblp devices (with vid/pid filtering to filter out
> > only the Lexmark). The code is unlikely to work under a non-Linux OS
> > 3. The scanner doesn't support CMD_OBJECT_POSITION. The windows driver
> > doesn't send this command. I've added code to skip this command if the
> > device model matches "SAMSUNG/ORION" (yes, that's the model name sent
> > by the firmware).
> > 4. On inquiry, the scanner returns zero values for maximum window
> > height (both AFP and manual values). I'm using the max_win_len value
> > instead.
> >
> > Let me know if you have any comments.
> >
> 
> Funnily enough, some time ago I was trying to get a Samsung SCX-4100
> working on SANE, supposedly supported by the xerox_mfp backend when it
> didn't advertise a USB scanner interface.
> Didn't get any joy with that backend OR the original Windows' driver,
> although printing worked fine on that and the Linux platform.
> Was very weird. Had to give up on it eventually and I have to wonder if
> the xerox_mfp backend had ever been actually tested on this machine.

https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1026159

> 
> Cheers,
> Ralph
>