[cups-devel] [MOD] STR #4725: cupsGetPPD3() function of CUPS library tries to load PPD from IPP printer and not from the CUPS queue

[Till Kamppeter]

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[STR New]

I have found out what the problem here is and I have a (simple) fix for it
(patch attached).

The problem was that cupsGetPPD3() uses cups_get_printer_uri() (also in
cups/util.c) to determine the printer URI but cups_get_printer_uri() has a
bug that it considers all ipp://... and ipps://... queues as pointing to a
remote CUPS queue and therefore returns the device URI for the PPD being
loaded from the remote CUPS server. If the ipp(s)://... printer is a native
IPP printer (or IPP-over-USB) this naturally not works.

The patch corrects the determination whether a queue is a remote CUPS
queue. With the patch applied the problem goes away. system-config-printer
opens the properties dialogs for all types of queues immediately with all
PPD options and the print dialog of Chromium Browser also opens immediately
and shows the PPD options of all queues.

Link: https://www.cups.org/str.php?L4725
Version: 2.1.0
Attachment: https://www.cups.org/strfiles.php/3576/fix-ppd-file-load-for-ipp-printers.patch
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