Solus was the first OS that worked smoothly with my printer. It connected right away and could even display ink levels. Sadly, no distro has been able to print double sided for me. (MacOS works, but I've tried Ubuntu and SUSE) It is an HP ColorLaserJet MFP M178-M181. Duplex just doesn't show up as an option. I know where it should be showing up and have tried many things in HPLip and CUPS to no avail.

    I wish I had the option, too.
    BUT I don't think it's a Solus thing. In Solus all I have is the Brother driver installed. Not enough.

    In W7 when I installed the Brother Bloatware (that comes w/printer) I did have 2-sided printing.
    In W7, for another printer, I refused the bloatware install, and did not have 2-sided printing.
    In other words, this advanced option was there and then not there.
    But we all remember things the way we remember them. I'm often wrong.

    Trick from the old days, of course, is for a 10 page doc, print pages 1 and 3 and 5 and 7 and 9.
    Flip stack in tray. Then print the even numbers for perfect 2-sided printing.

    Just don't do it the way I would (backwards) and end up with page one paired with page 10, etc. If there's a way to insert something wrong, I probably will.

      dbarron Yes, I forgot the words trial and error! I'm good at writing stuff down but not good at finding it, i.e. this perfect 2-sided technique..

        Thank you for your comments. I knew it wasn't solus' fault and most likely HPLIP's weakness. I will look into those projects.