samba - Jan 2023 - Print Management Blank After Working for Years

Hey everyone,

This caught me by surprise.

I set up printing through Samba over a year ago for better audit logging and
ease of isolating printers on to their own VLAN.
It's been working well for a long time.

A month ago I had problems when I upgraded to a newer version of Samba and got
things straightened out.

It's been humming along for about a month now with no issues on ~27 member
servers.

Last week, one of the local copier companies decided to come out and start
replacing copiers with no notice at 5 offices.

I pulled up Print Management, loaded the correct drivers, and those 5 offices
were done. Pretty simple.

Today, they showed up to replace copiers at 8 more locations.

I pulled up print management, and all the servers are blank. Nothing listed
under printers, drivers, ports or forms?even first 5 offices I set up. Printing
is working properly at those offices, and from a new machine, I can connect,
automatically install the print driver, and print stuff.

It's like the Print Management console is gorked.

Here are a few things I noticed/tried:
- All machines are running Samba from Debian: 2:4.17.3+dfsg-3~bpo11+1. Tried
upgrading one machine to 2:4.17.4+dfsg-3~bpo11+1 with no success
- Ports, Drivers, and Forms are populated correctly when I right-click the Samba
server and go to "properties" in the print management console.
- Trying to right-click on Printers and choosing "add" in print
management, and on the very last step it complains a printer with that name
already exists
- Tried switching from 'rpc_server:spoolss' = external and
'rpc_daemon:spoolssd' = fork to 'rpcd_spoolss:idle_seconds' =
300 and 'rpcd_spoolss:num_workers' = 5 with no success

Running the RPC commands manually appears to work:

root at ussnisdnas01:# rpcclient localhost <http://localhost> -U
"REDACTED\adebruyn" -c "enumdrivers"
Password for [REDACTED\adebruyn]:

[Windows NT x86]
Printer Driver Info 1:
Driver Name: [HP Universal Printing PCL 6]


[Windows x64]
Printer Driver Info 1:
Driver Name: [HP Universal Printing PCL 6]

root at ussnisdnas01:# rpcclient localhost <http://localhost> -U
"REDACTED\adebruyn" -c 'setdriver "ussnisdcpr01"
"HP Universal Printing PCL 6"'
Password for [REDACTED\adebruyn]:
Successfully set ussnisdcpr01 to driver HP Universal Printing PCL 6.
root at ussnisdnas01:# rpcclient localhost <http://localhost> -U
"REDACTED\adebruyn" -c "enumprinters"
Password for [REDACTED\adebruyn]:
flags:[0x800000]
name:[\\LOCALHOST <http://LOCALHOST>\ussnisdcpr01]
description:[\\LOCALHOST <http://LOCALHOST>\ussnisdcpr01,HP Universal
Printing PCL 6,ussnisdcpr01]
comment:[ussnisdcpr01]

root at ussnisdnas01:#

Unfortunately, manually setting the driver doesn't get printing working. It
appears to try to install the driver and then says "The print processor
does not exist".
I can uninstall the existing drivers for the "old" copier and
reconnect to it just fine.

I cranked up debug logging to 8 and don't see anything in
/var/log/samba/log.rpcd_spoolss (or the old /var/log/samba/log.spoolssdd).

Any thoughts on what I can look into next?

-A

On 23/01/2023 20:17, Aaron de Bruyn via samba wrote:
> Hey everyone,
> 
> This caught me by surprise.
> 
> I set up printing through Samba over a year ago for better audit logging
and ease of isolating printers on to their own VLAN.
> It's been working well for a long time.
> 
> A month ago I had problems when I upgraded to a newer version of Samba and
got things straightened out.
> 
> It's been humming along for about a month now with no issues on ~27
member servers.
> 
> Last week, one of the local copier companies decided to come out and start
replacing copiers with no notice at 5 offices.
> 
> I pulled up Print Management, loaded the correct drivers, and those 5
offices were done. Pretty simple.
> 
> Today, they showed up to replace copiers at 8 more locations.
> 
> I pulled up print management, and all the servers are blank. Nothing listed
under printers, drivers, ports or forms?even first 5 offices I set up. Printing
is working properly at those offices, and from a new machine, I can connect,
automatically install the print driver, and print stuff.
> 
> It's like the Print Management console is gorked.
> 
> Here are a few things I noticed/tried:
> - All machines are running Samba from Debian: 2:4.17.3+dfsg-3~bpo11+1.
Tried upgrading one machine to 2:4.17.4+dfsg-3~bpo11+1 with no success
> - Ports, Drivers, and Forms are populated correctly when I right-click the
Samba server and go to "properties" in the print management console.
> - Trying to right-click on Printers and choosing "add" in print
management, and on the very last step it complains a printer with that name
already exists
> - Tried switching from 'rpc_server:spoolss' = external and
'rpc_daemon:spoolssd' = fork to 'rpcd_spoolss:idle_seconds' =
300 and 'rpcd_spoolss:num_workers' = 5 with no success
> 
> Running the RPC commands manually appears to work:
> 
> root at ussnisdnas01:# rpcclient localhost <http://localhost> -U
"REDACTED\adebruyn" -c "enumdrivers"
> Password for [REDACTED\adebruyn]:
> 
> [Windows NT x86]
> Printer Driver Info 1:
> Driver Name: [HP Universal Printing PCL 6]
> 
> 
> [Windows x64]
> Printer Driver Info 1:
> Driver Name: [HP Universal Printing PCL 6]
> 
> root at ussnisdnas01:# rpcclient localhost <http://localhost> -U
"REDACTED\adebruyn" -c 'setdriver "ussnisdcpr01"
"HP Universal Printing PCL 6"'
> Password for [REDACTED\adebruyn]:
> Successfully set ussnisdcpr01 to driver HP Universal Printing PCL 6.
> root at ussnisdnas01:# rpcclient localhost <http://localhost> -U
"REDACTED\adebruyn" -c "enumprinters"
> Password for [REDACTED\adebruyn]:
> flags:[0x800000]
> name:[\\LOCALHOST <http://LOCALHOST>\ussnisdcpr01]
> description:[\\LOCALHOST <http://LOCALHOST>\ussnisdcpr01,HP Universal
Printing PCL 6,ussnisdcpr01]
> comment:[ussnisdcpr01]
> 
> root at ussnisdnas01:#
> 
> Unfortunately, manually setting the driver doesn't get printing
working. It appears to try to install the driver and then says "The print
processor does not exist".
> I can uninstall the existing drivers for the "old" copier and
reconnect to it just fine.
> 
> I cranked up debug logging to 8 and don't see anything in
/var/log/samba/log.rpcd_spoolss (or the old /var/log/samba/log.spoolssdd).
> 
> Any thoughts on what I can look into next?
> 
> -A
I think you are looking at this from the wrong end, Microsoft appears to 
be having problems with printers, It seems to have something to do with 
'PrintNightmare'. I seem to remember one cure was to totally remove the 
printer drivers and reload them, though this may not work.

Rowland

> Unfortunately, manually setting the driver doesn't get printing
working. It appears to try to install the driver and then says "The print
processor does not exist".
I've had this lots of times before after adding new printers.

I fix it by going into the print management console, right-clicking the deployed
printer and going into properties.
>From there, go to the advanced tab and click on 'print processor'.
Even though 'winprint' and 'RAW' are already selected, just
clicking on 'OK' and then 'apply' and 'OK' again to come
back out of all the dialog boxes seems to re-save something and fix it.
Tim