Hi,

did you stop cupsd when you started manipulating with printers.conf? And restarted afterwards?

Please provide job log for the job - see https://fedoraproject.org/wiki/How_to_debug_printing_problems

Anyway, connecting to samba share is done in smb backend provided by samba, authentication info is contained in device uri so smb can use it - reassigning to samba.

Created attachment 1654436 [details]
cups job log

Created attachment 1654437 [details]
cups whole log

(In reply to Zdenek Dohnal from comment #1)

> did you stop cupsd when you started manipulating with printers.conf? And
> restarted afterwards?
Yes I did, sorry for the confusion:
   systemctl stop cups.service
   edit /etc/cups/printer.conf
   systemctl start cups.service
  

> Please provide job log for the job - see
> https://fedoraproject.org/wiki/How_to_debug_printing_problems

I attached 2 logs. I hope it helps to narrow down the problem:
   cups_job_log
   cup_whole_log   

I glanced over it, but I cant see anything alerting. (though not sure what exactly to look for)

I still see the error message in the UI. (which for some reason I think is not reflected in the 2 last cups logs):
	"Unable to connect to CIFS host after (tried 3 times)"
  

> Anyway, connecting to samba share is done in smb backend provided by samba,
> authentication info is contained in device uri so smb can use it -
> reassigning to samba.

it seems like the samba end is working. I can print directly to the smb network printer just fine using the following command:
smbspool smb://username:passwd@DOMAIN/inf235/PTR155CLR 5 5 0 1 1 file.pdf

A small breaktrhu on this topic:

Finally found a way to get the printer status from the command line:

$lpstat -t
scheduler is running
system default destination: KONICA-MINOLTA-C658SeriesPS-P
device for KONICA-MINOLTA-C658SeriesPS-P: smb://plt/usscinf235/USSCPTR155CLR
KONICA-MINOLTA-C658SeriesPS-P accepting requests since Mon 20 Jan 2020 11:20:22 AM PST
printer KONICA-MINOLTA-C658SeriesPS-P disabled since Mon 20 Jan 2020 11:20:22 AM PST -
	Unable to connect to CIFS host after (tried 3 times)
KONICA-MINOLTA-C658SeriesPS-P-17 mattes        22924288   Tue 21 Jan 2020 04:56:30 PM PST


I thing I just caught, it says "printer disabled" (see line 5 in the response above).
this is something I did not spot / or is not shown on the GUI tool.

It seems cups is accepting new print jobs, but it is not executing them. Don't know when and how it got disabled for good.
Even the reboot last night did not change it. 

Anyway I just executed:
   
       $sudo cupsenable KONICA-MINOLTA-C658SeriesPS-P

that seemed to do the trick. 

$lpstat -t
scheduler is running
system default destination: KONICA-MINOLTA-C658SeriesPS-P
device for KONICA-MINOLTA-C658SeriesPS-P: smb://plt/usscinf235/USSCPTR155CLR
KONICA-MINOLTA-C658SeriesPS-P accepting requests since Tue 21 Jan 2020 05:22:56 PM PST
printer KONICA-MINOLTA-C658SeriesPS-P is idle.  enabled since Tue 21 Jan 2020 05:22:56 PM PST


Now the print jobs are executed.  I did 
  $lp -d KONICA-MINOLTA-C658SeriesPS-P file.ps

and  finally i see it printing. Including the queued up jobs.
Excellent. I think that fixed my print problem.


Tough one/two questions remain:

1)    Why is cups (or the print-config system) not adding the 'AuthInfoRequired' line when creating a new print smb queue
2)    Second, there seems to be no indication on the GUI tool that the printer is disabled
      And shouldn't a reboot automatically at least fix that up?


thanks for all the help to get this fixed. 
Hope someone can figure out what it takes to setup a SMB print queue with proper Authentication.
this is something that is broken since Fedora29 or so.

m

(In reply to Mat Kattanek from comment #5)
> Don't know when and how it got disabled for good.

smb backend returned error 'Unable to connect to CIFS host after (tried 3 times)' and you have probably default error policy for print queue - 'stop-printer'. The reason is to forbid overloading non-functional (backend should return CUPS_BACKEND_FAILED for serious error) queue with other jobs.

> Tough one/two questions remain:
> 
> 1)    Why is cups (or the print-config system) not adding the
> 'AuthInfoRequired' line when creating a new print smb queue

It is not needed for backends provided by CUPS - f.e. ipp backend does the check for username and password in device uri by default and use it if available. smb backend could do the same.

> 2)    Second, there seems to be no indication on the GUI tool that the
> printer is disabled

There is a indication in GNOME control center by text 'Paused', in CUPS web ui by text 'Paused' and in system-config-printer by symbol '||' in the right down corner of printer icon. (seen after I disabled the queue manually)

>       And shouldn't a reboot automatically at least fix that up?

Reboot does not influence the behavior, the error policy does - default is stop-printer, which gives opportunity to rerun job after you solve the reason why it failed before (f.e. smb backend was not able to connect samba share) and after you enable the queue.

I concurr,

I removed the 'AuthRequiredInfo' from /etc/cups/printer.conf and I can still print successfully to th e SMB network printer.
It is sufficient enough that the 'DeviceURI' contains the credentials needed for the SMB backend.

     DeviceURI smb://user:passwd@plt/usscinf235/USSCPTR155CLR

I conclude I misread the problem initially. All my printing problems where most likely caused because something 'disabled' the printer queue.
So all I did to get it to work:
 
$sudo cupsenable KONICA-MINOLTA-C658SeriesPS-P

$ lpstat -t
scheduler is running
system default destination: KONICA-MINOLTA-C658SeriesPS-P
device for KONICA-MINOLTA-C658SeriesPS-P: smb://plt/usscinf235/USSCPTR155CLR
KONICA-MINOLTA-C658SeriesPS-P accepting requests since Wed 22 Jan 2020 11:08:50 AM PST
printer KONICA-MINOLTA-C658SeriesPS-P is idle.  enabled since Wed 22 Jan 2020 11:08:50 AM PST