SUMMARY When I try to print a document from Okular it doesn't print, and it doesn't appear in the CUPS print queue. STEPS TO REPRODUCE 1. Open a document 2. Select Print from the File menu 3. Select my printer 4. Click the Print button OBSERVED RESULT No document is printed, and no job appears on the CUPS print queue. EXPECTED RESULT The document should be printed. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Debian (available in About System) KDE Plasma Version: 5.22.3 KDE Frameworks Version: 5.84.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION I've tried running okular in a terminal and when I try to print I see the following output: usage: lpr [-cdfghlmnpqrstv] [-#num] [-1234 font] [-C class] [-i [numcols]] [-J job] [-Pprinter] [-T title] [-U user] [-wnum] [name ...] This suggests that okular may be constructed an incorrect command for printing with lpr. However, I haven't tried to get it to show the command it's constructing.
It would seem you have have an incompatible lpr, make sure you have the cups one and not something else.
Ah, thank you. Yes, I've just installed the cups-bsd Debian package and now it works.