On Fri, 2018-02-23 at 09:38 -0400, J. Paul Bissonnette wrote:
> This error has basically plagued this canon since new
> [bjnp] bjnp_open_tcp: ERROR - Can not connect to scanner: Connection
> refused
> The printer part of this unit works on all computers 
> This is the error from every computer in the house. We are running
> either Xubuntu 16.04LTS or Ubuntu Studio 16.04LTS
> Any suggest
> Paul
A few questions first:

- Is the firewall opened correctly (see man sane-pixma)
- does this scanner even support the bjnp interface? Lately Canon is
excluding  bjnp support from (certain?) new scanners: 
check using avahi-discover and see if it repots something like:

Found service 'Canon MB5000 series-4' of type '_canon-bjnp1._tcp' in
domain 'local' on 2.0. 
Browsing for services of type '_canon-bjnp1._tcp' in domain 'local' on
2.1 ...
Browsing for services of type '_canon-bjnp1._tcp' in domain 'local' on
2.0 ...

Do NOT specify the scanner in pixma.conf UNLESS it is in a different 
ipv4 subnet (within one subnet it will auto-discvoer the scanner if it
supports bjnp)

BR, Louis

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