User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID: 20170816212843 Steps to reproduce: If printer works with PCL driver - duplex works fine. How it look like: Web page can be printed on two sheets. When user select duplex - page should be printed on one sheet of paper. Actual results: The page printed on the front side of two separate sheets of paper. Printer use duplex after each page, but don't print anything on second side. Expected results: The page printed on each sides of one sheet of paper.
Additional info: Version: Firefox 49.0.2 Result: PostScript with M225 - duplex okay, PCL with M1536 - duplex okay. Video: https://www.youtube.com/watch?v=tFWMZBlMXAI Version: Firefox 55.0.2 Result: PostScript with M225 - duplex failed, PCL with M1536 - duplex okay, PostScript with M1536 - duplex failed. Video: https://www.youtube.com/watch?v=tFWMZBlMXAI Tests with another applications: Firefox 55.0.2 -> Save to PDF, then print on PDF viewer & PDR editor: Version: Evince 3.24.1 Result: PostScript with M225 - duplex okay. Version: LibreOffice Draw 5.4.0 Result: PostScript with M225 - duplex okay. Environ: HP LaserJet Pro MFP M225rdn / HP LaserJet M1536dnf MFP Linux 4.12.8 gtk3-print-backends 3.22.18 CUPS 2.2.4 CUPS Filters 1.16.1 hplip 3.17.7 hplip-plugin 3.17.7
Severity: normal → major
OS: Unspecified → Linux
Hardware: Unspecified → x86_64
Looks like Bug 1321999, but I don't have any junk on pref.js.
Don't know why I can't edit my messages, but url to second video is wrong, https://www.youtube.com/watch?v=SOwP1rlEcIE
Component: Untriaged → Printing: Output
Product: Firefox → Core
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