Bug#1013437: cups: Nothing prints from driverless IPP queues unless added via lpadmin

["Gareth Evans" <donotspam@fastmail.fm>]

On Mon 27 Jun 2022, at 18:04, Brian Potkin <claremont102@gmail.com> wrote:
[...]
> Set up
>
>   lpadmin -p testeveq -v ipp://192.168.0.14/ipp/print -E -m everywhere
>
> and print to testeveq as before. We expect this to work.

Yes, it prints

> Now
>
>   lpadmin -p testq -v ipp://192.168.0.14/ipp/print -E -m driverless:ipp://192.168.0.14/ipp/print
>
> and print to testq. How does that go?

"testq" already exists, so I changed the queue name to avoid any potential caching effects etc in case that were possible.

$ sudo lpadmin -p testqq -v ipp://192.168.0.14/ipp/print -E -m driverless:ipp://192.168.0.14/ipp/print
lpadmin: Printer drivers are deprecated and will stop working in a future version of CUPS.
lpadmin: Unable to open PPD "/tmp/075ef62bac756": Missing PPD-Adobe-4.x header on line 0.

That's the first time I've seen this error message.

Thanks,
Gareth