Thanks for your reply.
Of course I've already tried that with no luck at all.
The short story of things that already was tried (all of them failed):
1. Added scanner's usb id to xerox_mfp.conf. Double checked udev rules for
correctness. Blacklisted usblp and built SANE with usb support.
2. Got
Hello everyone.
I am a long time Linux user and Samsung SCX-4100 owner. In ancient times
SANE didn't have support for my model or, for exmaple, SCX-4200, so I used
Samsung's binary driver. Now it is incompatible with modern 3.x kernels and
I think it's a turning point for me to drop it in favor
