SUMMARY KDE Print Manager doesn't respect the paper size to be "US Letter" in the configuration and still uses the default A4 size. The region and format set in KDE is "Canada - Canadian English (en_CA)", but I don't find anywhere to set the default paper size in the "Formats - System Settings". The only place to set paper size is in the KDE printer settings dialog. STEPS TO REPRODUCE 1. Set paper size to "US Letter" in the KDE printer setting 2. Print a PDF document in Okular OBSERVED RESULT The CUPS daemon prints the following log: D [19/Jul/2021:22:36:27 -0400] [Job 79] argv[5]="media=A4 sides=one-sided number-up=1 number-up-layout=lrtb job-billing= job-uuid=urn:uuid:e21dd7c7-e0c3-361f-7c2e-18a71efa315a job-originating-host-name=localhost date-time-at-creation= date-time-at-processing= time-at-creation=1626748580 time-at-processing=1626748587 document-name-supplied=0242c61005404 Duplex=None PageSize=A4" EXPECTED RESULT The CUPS should respect the paper size set to "US Letter". SOFTWARE/OS VERSIONS openSUSE Tumbleweed 20210716 Linux: 5.13.1 (available in About System) KDE Plasma Version: 5.22.3 KDE Frameworks Version: 5.84.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
More context information: My printer model is: EPSON Inkjet ET-2760 The driver version is epson-inkjet-printer-escpr 1.7.8-1.5.
After some analysis, this is identified as a QT bug: https://bugreports.qt.io/browse/QTBUG-95469. Therefore, I am closing this right now.