Canon TS6350 stopped printing after upgrade from 25.10 to 26.04

At some point, in order to get some useful feedback regarding CUPS actions, you might want to entertain using the following option:

sudo cupsctl --debug-logging

Then, to get a sense of what is happening, you can locate the relevant messages using

sudo  grep -iA6  "filter|error"  /var/log/cups/error_log

If you are only working with CUPS, and not using any specific Canon-supplied printer drivers, I strongly recommend you re-think the approach and go looking for the appropriate drivers and docs on their web site:

You might also want to look at a few other postings for additional discussion and insight regarding Canon printers or Canon-oriented CUPS.

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