[cups] Windows bypasses cups drivers

[Maarten Suetens]

Hello Alex,

I have a printer-specific driver installed on the server and set the 
color mode to black/white using the web interface. When i install that 
printer in the Windows client (through IPP) using a generic postscript 
driver the grayscale works.
We only want to enforce grayscale on our users so printing duplex should 
still be available, but this generic PS driver does not allow duplex 
printing.

So, i tried installing this same printer(with grayscale enabled) in the  
same client, only this time using printer specific PS driver so the 
users can still print duplex if they wanted to. Now the problem arises 
that grayscale is no longer enforced, i read this is due to the printer 
PS driver produces final printer specific data that is then forwarded 
"as is" to the printer device.

My question is basically whether i can make cups re-evaluate the PS job 
it gets from the windows client so that the duplex option coming from 
the windows driver is kept and the grayscale option from the server 
would be applied.

Thanks for taking an interest and kind regards,
Maarten

On 19/05/2014 16:09, Alex Korobkin wrote:
> Maarten,
> It is unclear if you uploaded printer-specific driver to the client or to
> the server.
>
> If you uploaded manufacturer-provided Windows drivers to the printserver as
> explained here
> https://wiki.samba.org/index.php/Samba_as_a_print_server#Uploading_printer_drivers_for_Point.27n.27Print_driver_installation
> you can set the default settings to grayscale printing (Advanced > Printing
> defaults), and every new client will have that set by default.
>
>
>
> 2014-05-19 3:32 GMT-04:00 Maarten Suetens <suetens.maarten at gmail.com>:
>
>> Hello all,
>>
>> I'm currently trying to enforce grayscale printing at the company I work
>> at through cups. I have added the printer (sharp mx2600n) to the cups
>> server using the ppd file and on the web interface i set the color mode to
>> black & white.
>>
>> When i print from the cups server(CentOS 6.5) it does use the grayscale
>> and when i add the printer in Windows using generic postscript drivers it
>> also enforces the grayscale correctly. But the problem is that the generic
>> PS drivers does not support duplex printing.  When i add the printer to
>> Windows using printer specific PS driver, the settings configured on the
>> server are completely ignored and prints are being made in full color.
>>
>> Any help would be greatly appreciated.
>>
>> Thanks in advance and kind regards,
>> Maarten
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>>
>
>