I could reproduce it now with Ondrej's PPD file, thank you very much, Ondrej.
I also found the default PPD file for the HP Colour LaserJet CP2025dn (the PostScript one of HPLIP), the printer of the original poster, Hugo Squelch, thanks, Hugo. With this I fixed it upstream now: https://github.com/OpenPrinting/libppd/commit/a86f9993674f1 All PPD files with "MirrorPrint" option cuased mirrored printout If a PPD contains an option "MirrorPrint", the ppdFilterLoadPPD() sent the option "mirror=true" to the filter functions, regardless of the actual setting of "MirrorPrint" (which is usually "False" by default). This made all printouts on printers using a PPD file with a "MirrorPrint" option coming out mirrored, with no way to counteract this by any options or attributes. This is fixed now by checking the setting of "MirrorPrint". ** Changed in: cups (Ubuntu) Status: Incomplete => In Progress ** Package changed: cups (Ubuntu) => libppd (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/2018538 Title: All PDFs when printed come out mirror image Status in libppd package in Ubuntu: In Progress Bug description: Since updating to Ubuntu 23.04. Whenever I try to print a PDF (regardless of application the PDF is open in) it will print the PDF in mirror image. If I enable printing mirror image in the settings, every other page become mirror image as instead. (I'm printing double sided/long edge print, so one side is normal and the other side becomes mirror image when I do this). I'm trying to print to a HP Colour LaserJet CP2025dn Note: If I print from my second device when it was running Ubuntu 22.10 it would print normally, but as soon as I updated it to 23.04, it started having the same issue as well. ProblemType: Bug DistroRelease: Ubuntu 23.04 Package: ubiquity (not installed) ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6 Uname: Linux 6.2.0-20-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.26.1-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu May 4 20:31:48 2023 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash --- InstallationDate: Installed on 2022-10-22 (194 days ago) InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020) SourcePackage: ubiquity Symptom: installation UpgradeStatus: Upgraded to lunar on 2023-04-21 (13 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libppd/+bug/2018538/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp