Canon GX7050: Not all options work via driverless configuration

[flipreverse]

Describe the bug
The printer does not use my configured print job options

To Reproduce
Steps to reproduce the behavior:

1. Add the printer: lpadmin -p 'Canon-GX7050' -v 'ipp://192.168.111.206/ipp/print' -E -m 'driverless:ipp://192.168.111.206/ipp/print'

• It does not make any difference using lpadmin or the CUPS webinterface.
• Happens on both IPP and IPPS
• Makes no difference if I use the IPv4 address or the DNS Canon%20.local.

2. Choose any document, e.g., PDF, to print
3. Select the second tray, increase number of copies, and/or select long-egde binding
4. Click on print
5. The printer only uses tray 1, ignores long-edge binding, and aborts the print job if duplex and multiple copies is used. Without duplex, it also not able to print multiple copies.

Expected behavior
Print the job as desired.

Screenshots
None.

System Information:

• OS: Debian Testing 13
• Browser: Firefox 122.0
• Version: 1.28.17-3+b1

Additional context
I was able to fix the tray issue by editing the PPD file. Here is my diff
Canon-GX7050-ppd.txt.
Here is the PPD file manually generated by driverless ipps://192.168.111.206/ipp/print: Canon-GX7050-driverless-ppd.txt.

[mkosch]

The following tray specifications also work:

*InputSlot Auto: "<</MediaPosition 0>>setpagedevice"
*InputSlot Rear: "<</MediaPosition 18>>setpagedevice"
*InputSlot Tray1: "<</MediaPosition 11>>setpagedevice"
*InputSlot Tray2: "<</MediaPosition 13>>setpagedevice"

[mkosch]

For me duplex printing and printing multiple copies work.
I added the printer using the web interface of CUPS 2.4.7.

Here you can find my current (self-modified) PPD file: Canon_GX7050-color.ppd.txt