[cups] Problem with cups selecting manual tray on HP laserjet

[Helge Blischke]

Well, the PPD generated for this printer contains a weird dupsfilter2 statement
which punishes application/postscriot as a final content type with a cost of 700
(seven hundred !!!).
That means that, whiteout heavily editing the PPD, it is impossible to get PosstScript
to the printer.

If this is essential for you, I could edit a PPD for you, and you’d need to install 
the printer manually (by command line via the lpadmin command or the web interface)
using the dnssd backend.

But I’m not sure if you’d deactivate the driverless backend (and possibly the cups-browsed utility)
in addition.

As I don’t have such a printer, I cannot test this approach at my site.

Helge

> Am 16.12.2022 um 18:35 schrieb Steinar Bang <sb at dod.no>:
> 
>>>>>> Kurt Pfeifle <kurt.pfeifle-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org>:
> 
>> The PPD is auto-generated by CUPS. (Yes, it comes from the printer, but
>> indirectly.)
> 
>> The process is as follows:
> 
>> 1. CUPS uses the "driverless" backend to query the printer for its
>> capabilities
>> 2. This query uses IPP parlance (the Internet Printing Protocol), and the
>> printer responds with IPP too.
>> 3. "driverless" translates the printers responses into PPD-syntax to
>> describe the printer's capabilities to ensure that legacy applications
>> which need to see a "PPD" file for printing see one.
>> [4. "driverless" is provided by LinuxFoundation/Openprinting.org as an
>> add-on, and is not part of CUPS core.]
> 
> Would I get more predictable behaviour if I used a proper CUPS driver
> instead of driverless?
> 
> Can a generic PostScript printer driver be used? (Note: I want
> PostScript as the target format for the printer, not as an intermediate
> format )
> 
> Or should I try to find a printer driver that matches the printer?
> 
> Thanks!
> 
> 
> - Steinar
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