https://bugs.kde.org/show_bug.cgi?id=526774
--- Comment #2 from Jean-Michel Elyn <[email protected]> --- Additional findings after further investigation: I installed and configured the official Brother MFC-L8390CDW Linux driver (version 3.5.1-2), using a separate CUPS queue (`Brother-Native`) with an AppSocket connection (`socket://printer.local:9100`). Results: - Direct printing with `lp -o Duplex=DuplexNoTumble` works correctly with the Brother driver. - Printing the same PDF from Okular using `Brother-Native`, with long-edge binding selected, still produces an upside-down back side. - Other applications, including qpdfview, can print correctly using the appropriate printer configuration. We also verified that CUPS correctly receives the requested duplex options. This provides further evidence that the issue is related to Okular's printing path, rather than simply incorrect printer settings or a hardware duplex limitation. The issue remains reproducible with Okular 26.08.2 and Qt 6.12.0. -- You are receiving this mail because: You are watching all bug changes.
