[sane-devel] Canon MX922 scan error

[J. Paul Bissonnette]

On Fri, 23 Feb 2018 16:02:24 +0100
Louis Lagendijk <louis at fazant.net> wrote:

> 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. 
> or
> 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
> 
> 
> 
> 
Sanner is discoverable and on the same net

I set the Firewall 	
BJNP	8612-8612	TCP	8612-8612
Problem even when firewall is disabled

Man sane-pixma claims the MX920 series is supported
output frpm avahi-discover
jpb at maple:~$ avahi-discover
Browsing domain 'local' on -1.-1 ...
Browsing for services of type '_canon-bjnp1._tcp' in domain 'local' on
2.1 ... Browsing for services of type '_scanner._tcp' in domain 'local'
on 2.1 ... Browsing for services of type '_smb._tcp' in domain 'local'
on 2.1 ... Browsing for services of type '_device-info._tcp' in domain
'local' on 2.1 ... Browsing for services of type '_http._tcp' in domain
'local' on 2.1 ... Browsing for services of type '_ipp._tcp' in domain
'local' on 2.1 ... Browsing for services of type '_ipps._tcp' in domain
'local' on 2.1 ... Browsing for services of type '_printer._tcp' in
domain 'local' on 2.1 ... Browsing for services of type
'_canon-bjnp1._tcp' in domain 'local' on 2.0 ... Browsing for services
of type '_scanner._tcp' in domain 'local' on 2.0 ... Browsing for
services of type '_smb._tcp' in domain 'local' on 2.0 ... Browsing for
services of type '_device-info._tcp' in domain 'local' on 2.0 ...
Browsing for services of type '_http._tcp' in domain 'local' on 2.0 ...
Browsing for services of type '_ipp._tcp' in domain 'local' on 2.0 ...
Browsing for services of type '_ipps._tcp' in domain 'local' on 2.0 ...
Browsing for services of type '_printer._tcp' in domain 'local' on
2.0 ... Found service 'Canon MX920 series' of type '_canon-bjnp1._tcp'
in domain 'local' on 2.1. Found service 'Canon MX920 series' of type
'_scanner._tcp' in domain 'local' on 2.1. Found service 'casper' of
type '_smb._tcp' in domain 'local' on 2.1. Found service 'casper' of
type '_device-info._tcp' in domain 'local' on 2.1. Found service 'Canon
MX920 series' of type '_http._tcp' in domain 'local' on 2.1. Found
service 'casper' of type '_http._tcp' in domain 'local' on 2.1. Found
service 'Canon MX920 series' of type '_ipp._tcp' in domain 'local' on
2.1. Found service 'MX922 @ casper' of type '_ipp._tcp' in domain
'local' on 2.1. Found service 'Canon_PIXMA_MX920series_(TurboPrint) @
maple' of type '_ipp._tcp' in domain 'local' on 2.1. Found service
'Canon MX920 series @ maple' of type '_ipp._tcp' in domain 'local' on
2.1. Found service 'Canon MX920 series @ maple' of type '_ipps._tcp' in
domain 'local' on 2.1. Found service
'Canon_PIXMA_MX920series_(TurboPrint) @ maple' of type '_ipps._tcp' in
domain 'local' on 2.1. Found service 'Canon MX920 series' of type
'_printer._tcp' in domain 'local' on 2.1. Found service 'MX922 @
casper' of type '_printer._tcp' in domain 'local' on 2.1. Found service
'Canon_PIXMA_MX920series_(TurboPrint) @ maple' of type '_printer._tcp'
in domain 'local' on 2.1. Found service 'Canon MX920 series @ maple' of
type '_printer._tcp' in domain 'local' on 2.1. Found service 'Canon
MX920 series' of type '_canon-bjnp1._tcp' in domain 'local' on 2.0.
Found service 'Canon MX920 series' of type '_scanner._tcp' in domain
'local' on 2.0. Found service 'casper' of type '_smb._tcp' in domain
'local' on 2.0. Found service 'casper' of type '_device-info._tcp' in
domain 'local' on 2.0. Found service 'Canon MX920 series' of type
'_http._tcp' in domain 'local' on 2.0. Found service 'casper' of type
'_http._tcp' in domain 'local' on 2.0. Found service 'Canon MX920
series' of type '_ipp._tcp' in domain 'local' on 2.0. Found service
'MX922 @ casper' of type '_ipp._tcp' in domain 'local' on 2.0. Found
service 'Canon_PIXMA_MX920series_(TurboPrint) @ maple' of type
'_ipp._tcp' in domain 'local' on 2.0. Found service 'Canon MX920 series
@ maple' of type '_ipp._tcp' in domain 'local' on 2.0. Found service
'Canon MX920 series @ maple' of type '_ipps._tcp' in domain 'local' on
2.0. Found service 'Canon_PIXMA_MX920series_(TurboPrint) @ maple' of
type '_ipps._tcp' in domain 'local' on 2.0. Found service 'Canon MX920
series' of type '_printer._tcp' in domain 'local' on 2.0. Found service
'MX922 @ casper' of type '_printer._tcp' in domain 'local' on 2.0.
Found service 'Canon_PIXMA_MX920series_(TurboPrint) @ maple' of type
'_printer._tcp' in domain 'local' on 2.0. Found service 'Canon MX920
series @ maple' of type '_printer._tcp' in domain 'local' on 2.0.