Problem: Konica Minolta bizhub i-Series won't print dupelx.
- Change the printer driver to Postscript 3 as octet-stream.
- If not already checked, then check the box 'include PJL header with binary stream (application/octet-stream).
- Submit your changes by clicking 'Update printer'
- Refresh the directprint.io client to receive the changes
- Try a duplex test print.