On Tue, Aug 30, 2022 at 11:14 AM Jonathan Ryshpan <jonrysh@xxxxxxxxxxx> wrote:
Whenever I try to print from Okular, a box with this message appears:There are conflicts in duplex settings. Do you want to fix them?And printing is in fact funky: the options for double sided printing:Okular->Print->Optionsare strange. The option "Long Side Printing" is selected (though greyed out); the option "Off" is selectable, but if selected, no other option can be selected afterward. Firefox doesn't allow control of duplex printing using its native print dialog, but duplex can be controlled using the system dialog.Does anyone know what's going on or how to fix it.Printer:HP Color Laserjet M255dw
HP "specs" say it has USB as well as wired or wireless network printing and that it
supports Apple Airprint.
Which communications interface are are you using?
Airprint comes from IPP, which is the current "driverless" network protocol used by
CUPS (from when CUPS was an Apple project). There are drivers that make USB
look like IPP, but I assume those are printer-specific. Airprint may diverge from IPP
in the future, but HP's specs say this model works with older macOS versions, so
should support CUPS driverless printing for ethernet and wifi.
For USB, see https://github.com/OpenPrinting/ipp-usb. The "Issues" section has
examples of troubleshooting on linux:
George N. White III
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