Canon Pixma G3501 & *Ubuntu 18.04 LTS: though I CAN print, I CANNOT scan.

[Brian]

On Sun 05 Apr 2020 at 08:14:46 -0400, Gene Heskett wrote:

> On Sunday 05 April 2020 05:23:53 Brian wrote:
> 
> > On Fri 03 Apr 2020 at 07:57:31 -0400, Little Girl wrote:
> > > Hey there,
> > >
> > > Bas Roufs wrote:
> > > >Canon Pixma G3501 & *Ubuntu 18.04 LTS: though I CAN print, I CANNOT
> > > >scan.
> > >
> > > This may or may not be the same for you with your Canon printer, but
> > > my Brother printer does wired or wireless printing, but can only do
> > > wired scanning from my Ubuntu MATE machine. This is definitely a
> > > GNU/Linux driver issue, because the same printer does wireless scans
> > > with no issues from Windows, from an Android tablet, and from my
> > > iPad.
> >
> > SANE does not provide a backend for Brother MFDs. The Android tablet
> > and the iPad do not use SANE but AirScan, which Ubuntu 18.04 can also
> > use. Lack of wireless scanning is not a GNU/Linux driver issue.
> 
> Oh? Somebody should tell the MFC-J6920DW on the next desk, xsane runs it 
> just fine at up to 11x17. Even the ADF works for the usual sizes, but 
> manually on the bed for 11x17. Using brothers linux drivers.

Tell the MFC-J6920DW what? I'll try to be more precise.

The MFC-J6920DW does not use a backend provided by the SANE project
but one provided by Brother. A failure to scan over a wireless link
is either a matter for Brother or (more likely) a user induced issue.

Pointing a finger at GNU/Linux with either Brother or Canon scanners
sweeps both problems under the carpet.

-- 
Brian.