[Printing-architecture] driverless clients after cups upgrade and general qyestion about larger environment concepts

[Printing-architecture] driverless clients after cups upgrade and general qyestion about larger environment concepts

[Beyer, Christoph]

Hi,

I am new on this list and would like to bother you with a (maybe stupid question) right away :) 

I do run a 'large' environment with roughly 1.000 queues pointing to 500 printers, the current setup involves a lpd server as a backend talking to the printers and different cups servers for different departments offering the relevant share of the queues to the LINUX clients. 

I use the factory provided PPD files for the printers and lpadmin to install the printers on the cups server (with an lpd backend pointing to the lpd server) then poll-server <cups-server-of-this-department> directive in cups-browsed.conf on the LINUX client.

After a recent upgrade to CUPS 2.4.1 on the cups servers (coming from ubuntu 18.04- whatever cups version that was)  support for color printing stopped and on the clients desktops I recognize that the printers are visible but tagged as 'driverless' which is probably part of my problem (?)

Maybe the whole concept is also a bit ignorant towards the ideas of cups but for quite a while I did not really see the concept of a client-server model for larger entreprise installations that can not rely on browsing etc.  ? 

Any insight would be much appreciated ! 

Best
christoph

Re: [Printing-architecture] driverless clients after cups upgrade and general qyestion about larger environment concepts

[Zdenek Dohnal]

Hi,

there was a bug regarding color printing in 2.4.1, which is mostly fixed 
(only one corner case remains to fix) in the current master branch of CUPS.

Relevant PRs:

https://github.com/OpenPrinting/cups/pull/417

https://github.com/OpenPrinting/cups/pull/451

https://github.com/OpenPrinting/cups/pull/500

You can ask your distro maintainer for including those patches until 
there is a new release.

(@Till ^^)


Zdenek

On 3/8/23 09:03, Beyer, Christoph wrote:
> Hi,
>
> I am new on this list and would like to bother you with a (maybe stupid question) right away :)
>
> I do run a 'large' environment with roughly 1.000 queues pointing to 500 printers, the current setup involves a lpd server as a backend talking to the printers and different cups servers for different departments offering the relevant share of the queues to the LINUX clients.
>
> I use the factory provided PPD files for the printers and lpadmin to install the printers on the cups server (with an lpd backend pointing to the lpd server) then poll-server <cups-server-of-this-department> directive in cups-browsed.conf on the LINUX client.
>
> After a recent upgrade to CUPS 2.4.1 on the cups servers (coming from ubuntu 18.04- whatever cups version that was)  support for color printing stopped and on the clients desktops I recognize that the printers are visible but tagged as 'driverless' which is probably part of my problem (?)
>
> Maybe the whole concept is also a bit ignorant towards the ideas of cups but for quite a while I did not really see the concept of a client-server model for larger entreprise installations that can not rely on browsing etc.  ?
>
> Any insight would be much appreciated !
>
> Best
> christoph
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> https://lists.linuxfoundation.org/mailman/listinfo/printing-architecture
>
-- 
Zdenek Dohnal
Software Engineer
Red Hat, BRQ-TPBC