I'm not quite sure what finally solved this type of problem for me with my Canon GX6050, but have you installed xsane?
Cheers Harvey On Tue, 2023-05-23 at 08:29 +0200, Fabrizio Gennari wrote: > Hi, > > I'm using Ubuntu 23.04 with scanimage (sane-backends) 1.1.1-debian; > backend version 1.1.1 installed. > > I got a new Canon MF657Cdw, and running scanimage -L gives the > message > > [08:26:07.338607] [bjnp] add_scanner: Scanner MF650C Series is not > supported, model is unknown! Please report upstream > > What can be done? Should I download the latest source from Git, > recompile, and see if that works? Maybe one of the existing backends > work? > > Regards, > Fabrizio > >